Boss Graham Westley relishes pressure from his Peterborough United chairman, who said he would sell if Posh were not promoted in the next 18 months.

Darragh MacAnthony, whose side are 11th in League One, tweeted on Saturday after Posh's 4-0 loss to Bradford City.
Westley said: "You never win anything unless you put pressure on yourselves. I'm cool with any strategy he's got that heaps the pressure on.
"You test yourself when the going is tough and people demand results.
He added to BBC Radio Cambridgeshire: "If you can't stand the heat, get out the kitchen. I love this kitchen."
MacAnthony has been Posh chairman since 2006 when the club were in League Two, and since then they have earned promotion to the Championship twice, but have been in League One for three seasons.
Westley replaced Dave Robertson in September and has guided the club from 18th in the table to six points off the play-offs, as well as the FA Cup fourth round, where they took Premier League side West Brom to a replay and lost in a penalty shootout.
"I'm sure (MacAnthony) means his comments as I've never known him to say something he didn't mean," added Westley.
"He's very much a man of his word in my experience, but I don't think he intends to sell the club, he intends to win promotion.
"Someone was speaking to me earlier in the week about what if he goes, and I said I'd talk the board into keeping him because he's good at what he does."


Nottingham Forest were plunged deeper into relegation trouble as Aron Gunnarsson gave Cardiff victory.

The hosts were closest to scoring in a cagey first half as Peter Whittingham's thunderous long-range shot hit the bar.
Gunnarsson won it for Cardiff with a swerving first-time effort from 25 yards, though Apostolos Vellios almost equalised but also hit the woodwork.
Forest drop to 21st place in the Championship table, just one point above the bottom three.
Cardiff, meanwhile, climb up to 13th after a third successive home win.
A significant day at the foot of the Championship saw four of Forest's relegation rivals taking each other on, with Blackburn hosting Bristol City and Birmingham at home to Burton.
Perhaps mindful of how tight things were in the bottom half, Mark Warburton's side started a little apprehensively against Cardiff, who were the first to threaten with Whittingham's booming 30-yard shot which crashed against the crossbar.
Other than that and a powerful long-range effort from Forest's Mustapha Carayol, there was precious little in terms of scoring opportunities in the first half.
There was more entertainment near the dugout, where Cardiff assistant manager Kevin Blackwell and his opposite number David Weir had to be separated after frayed tempers almost led to a scuffle.
Forest appeared to harness that emotion at half-time, emerging after the restart with renewed vigour and attacking intent.
Carayol looked their likeliest source of a goal, unnerving the home defence with his direct and quick running.
Despite the visitors' improvement, it was Cardiff who made the breakthrough as Kadeem Harris' cross was only half-cleared, leaving the ball to bobble invitingly into the path of Gunnarsson, who unleashed a fierce first-time shot which swerved beyond Jordan Smith and into the far corner.
Forest rallied, with substitutes Vellios and Britt Assombalonga threatening - but the former wasted their best opportunity as his looping header bounced on to the bar, stretching their winless run away from home to 11 league games.
Cardiff City manager Neil Warnock:
"Gunnar normally whacks the pigeon off the top of the stand with those strikes. It was like a missile going into the top corner.
"I watched it all the way in and the goalkeeper had no chance. It was a cracking finish. I think he can do more in attack and should be pushing for 10 goals a season, but I'm delighted.
"I know people have said we've got nothing to play for, but we wanted to have a real go and I think we did that."
Nottingham Forest manager Mark Warburton:
"We created some good chances to score, but I'm disappointed we conceded a goal from 25 yards because I thought we did more than enough to get a point.
"We are where we are and I'm not getting away from that. But if we play like we did today and show the desire and work ethic we did, then we'll be okay. I hope the supporters saw that in our performance because this is a very tough place to come.
"We have to concentrate on ourselves now because if you don't do that in this league, you pay the price."
Match ends, Cardiff City 1, Nottingham Forest 0.
Second Half ends, Cardiff City 1, Nottingham Forest 0.
Attempt missed. Eric Lichaj (Nottingham Forest) header from the centre of the box misses to the left. Assisted by Mustapha Carayol with a cross.
Offside, Cardiff City. Kenneth Zohore tries a through ball, but Junior Hoilett is caught offside.
Attempt blocked. Kenneth Zohore (Cardiff City) right footed shot from the centre of the box is blocked. Assisted by Joe Bennett.
Foul by David Vaughan (Nottingham Forest).
Kadeem Harris (Cardiff City) wins a free kick on the left wing.
Offside, Cardiff City. Greg Halford tries a through ball, but Junior Hoilett is caught offside.
Foul by Apostolos Vellios (Nottingham Forest).
Sean Morrison (Cardiff City) wins a free kick in the defensive half.
Joe Worrall (Nottingham Forest) wins a free kick in the defensive half.
Foul by Kenneth Zohore (Cardiff City).
Attempt blocked. Apostolos Vellios (Nottingham Forest) right footed shot from outside the box is blocked. Assisted by Zach Clough.
Daniel Fox (Nottingham Forest) wins a free kick in the defensive half.
Foul by Kenneth Zohore (Cardiff City).
Foul by Apostolos Vellios (Nottingham Forest).
Greg Halford (Cardiff City) wins a free kick on the left wing.
Attempt missed. Junior Hoilett (Cardiff City) right footed shot from the centre of the box is close, but misses the top right corner. Assisted by Joe Bennett.
Substitution, Cardiff City. Greg Halford replaces Peter Whittingham.
Attempt missed. Britt Assombalonga (Nottingham Forest) left footed shot from the centre of the box is high and wide to the left. Assisted by Ben Osborn.
Attempt blocked. Ben Osborn (Nottingham Forest) left footed shot from the right side of the box is blocked.
Attempt blocked. Chris Cohen (Nottingham Forest) left footed shot from outside the box is blocked. Assisted by Ben Osborn.
Apostolos Vellios (Nottingham Forest) hits the bar with a header from very close range. Assisted by Mustapha Carayol with a cross.
Attempt missed. Aron Gunnarsson (Cardiff City) right footed shot from outside the box is too high. Assisted by Kadeem Harris.
Foul by David Vaughan (Nottingham Forest).
Kadeem Harris (Cardiff City) wins a free kick in the attacking half.
Substitution, Nottingham Forest. Apostolos Vellios replaces Daniel Pinillos.
Foul by Britt Assombalonga (Nottingham Forest).
Allan McGregor (Cardiff City) wins a free kick in the defensive half.
Attempt blocked. Joe Worrall (Nottingham Forest) right footed shot from the centre of the box is blocked.
Corner,  Nottingham Forest. Conceded by Joe Bennett.
Substitution, Cardiff City. Joe Ralls replaces Anthony Pilkington.
Zach Clough (Nottingham Forest) wins a free kick in the attacking half.
Foul by Aron Gunnarsson (Cardiff City).
Substitution, Nottingham Forest. Zach Clough replaces Ben Brereton.
Substitution, Nottingham Forest. Britt Assombalonga replaces Jamie Ward.
Eric Lichaj (Nottingham Forest) wins a free kick in the defensive half.
Foul by Anthony Pilkington (Cardiff City).
Offside, Nottingham Forest. Ben Osborn tries a through ball, but Ben Brereton is caught offside.
Joe Worrall (Nottingham Forest) wins a free kick in the defensive half.


Former IMF chief Rodrigo Rato and 64 other bankers have gone on trial in Madrid over an alleged credit card racket at Spain's troubled Bankia bank.

The defendants allegedly used "unofficial" company credit cards for luxury purchases, unconnected with their duties as board members.
Prosecutors say about €12m (£10.4m; $13.5m) was spent on hotels, fine clothes, entertainment and travel.
Mr Rato denies wrongdoing. Bankia was rescued in 2012 at huge public expense.
The unofficial credit card purchases were not declared to the tax authorities. The system allegedly started at Caja Madrid bank and was continued by Mr Rato when Bankia was created in 2011.
How Spanish activists landed ex-IMF chief in court
A member of the governing centre-right Popular Party (PP), Mr Rato resigned as head of Bankia shortly before its near-collapse in 2012.
The government bailout of Bankia inflicted losses on 200,000 small investors, who held preferential shares in the bank.
Some of them voiced their anger outside the Madrid courthouse on Monday. "You wretches! Stealing money from pensioners!" they shouted at the accused as the trial got under way.
Prosecutors are seeking four-and-a-half years in jail for Mr Rato and six years for Miguel Blesa, the former president of Caja Madrid, a bank that was merged with six others in 2011 to create Bankia.
If found guilty, Mr Rato could also face a €2.7m fine, and Mr Blesa a fine of €9.3m.
Mr Rato headed the International Monetary Fund from 2004-2007. He also served as Spanish economy minister, and his fall from grace helped fuel accusations that the Popular Party was riddled with corruption.
Prosecutors say the lavish credit card purchases took place from 2003-2012 - some of them during Spain's financial crisis, when millions of citizens suffered hardship and unemployment soared.
Mr Rato's two successors at the top of the IMF have also been caught up in high-profile court cases.
French Socialist Dominique Strauss-Kahn took over from Mr Rato in 2007 but resigned in May 2011 to defend himself against charges of attempted rape in New York. Prosecutors dropped the charges later that year, then Mr Strauss-Kahn reached an out-of-court settlement with the hotel maid who accused him.
In a separate case last year, he was acquitted by a French court of the charge of "aggravated pimping" in connection with sex parties involving prostitutes.
Mr Strauss-Kahn's successor at the IMF, Christine Lagarde, is to go on trial in France in December over a state award of €285m in damages to tycoon Bernard Tapie when she was finance minister. She is accused of "negligence", but denies any misconduct.


HSBC is the first big UK bank to explain in detail how it intends to get round the new European Union prohibition on big bonuses and continue to pay its top people many millions of pounds each.

There are two ways of seeing its plans: either as sticking two fingers up to Brussels, in a way that maybe is not appropriate for such a big and important institution; or as demonstrating the madness of the EU's attempt to curb local behaviour, in this case the pay of bankers, in businesses which have to compete in a global market.
The background is that a new EU law, known as CRD IV, prohibits variable pay - usually referred to as bonuses - greater than 100% of base salary, or 200% with the approval of shareholders.
Which means that as of next year, the pay policies of HSBC - and most other European headquartered banks - would be illegal, without reform.
For example, HSBC's chief executive, Stuart Gulliver, earned £5.5m in an annual incentive and what HSBC calls its Group Performance Share Scheme (GPSS) in 2013.
That is 4.4 times Mr Gulliver's base salary of £1.25m, so considerably more in variable pay than he would be allowed under the EU constraint (and, for what it's worth, Mr Gulliver earned £8m in total, including benefits and pension contribution of £1.2m).
In fact, Mr Gulliver could have earned even more in variable pay, £6.75m or 5.4 times his base pay, if he had hit all targets.
However, as of the current financial year, Mr Gulliver will only be able to earn a maximum of £2.5m from his annual incentive and GPSS (you are probably thinking, "poor lambykin").
So HSBC will top him up with what it calls a "fixed pay allowance" of £1.7m, paid in quarterly lumps.
In other words, his maximum remuneration is falling from £6.75m last year - excluding benefits and pension contribution - to a maximum of just under £5.5m. And given that he is unlikely to get the maximum in variable pay, perhaps he will earn £5m.
Which looks like a chunky pay cut.
But his fixed pay, what is guaranteed to him, is rising from £1.25m to £3m. And most people would say guaranteed pay is more valuable and desirable for the receiver than performance-related variable pay, although it is usually thought of as less desirable by the proprietor of a business.
Any bank, for example, will lend rather more to someone whose income is fixed than to one whose income varies.
So Mr Gulliver - and the hundreds of other HSBC bankers who will see a portion of their bonuses and variable pay converted into this new fixed pay allowance - will not be on their uppers.
What are the broader consequences of this remuneration reconstruction?
Well, HSBC will have a clunkier pay system, but hopes it won't see its more able people deserting to American, Swiss or Asian banks that don't operate within the same remuneration constraints.
Is there a social and political consequence? Does it matter that HSBC - and the other big banks - will be seen as responding to a new law by coming up with a ruse that many will see as dodging it?
The banks will say they have the UK regulator and UK government on their side, since both have said they disapprove of the new EU bonus limit.
However, the law is the law, as they say. There are many laws that millions of people find irksome, but follow in letter and spirit.
So if HSBC and other banks are seen to be gaily skipping around an EU law they dislike, it may not do a good deal either for their popularity or for the majesty and authority of Brussels.


Unemployment in Scotland has fallen below the UK rate, according to the latest official figures.

The Office for National Statistics (ONS) said the rate in Scotland between May and July had fallen to 4.7%, with the UK as a whole at 4.9%.
The employment level rose 51,000 over the quarter to 2,631,000 - the largest quarterly rise on record.
The Scottish government said the figures underlined the importance of EU and single market membership.
Across the UK as a whole, the number of people without jobs and looking for work fell by 39,000 to 1.63 million.
Average weekly earnings including bonuses increased by 2.3% on last year, down slightly from the previous report. The proportion of people in work hit a record high of 74.5%.
The latest numbers don't tell us much about the impact of the Brexit vote. It's too early for that.
The claimant count for August is one measure that is taken after the vote, and that has seen only limited change, so far.
The statistics return the Scottish jobs market to being in a slightly better position to that of the UK as a whole. So what's changed to make that possible?
The simple answer: no-one knows. I've been hearing from some who can make educated guesses. One suggests the weakening of the pound - which proceeded the Brexit vote - may has boosted tourism employment in May to July, both through more foreigners coming to Scotland and with more British people "staycationing".
Scotland has a relatively large tourist sector, and it's been doing fairly well of late.
Another economist points to underlying factors to do with inactivity rates - largely made up of family carers, the long-term ill, full-time students, early retirees and a much smaller number of so-called "discouraged".
Taken over a year in which the number seeking work went up by 33,000, the number counted as inactive went up by 30,000. Employment was up 17,000 in that period.
So this is not the simple model of people being unemployed, and then finding a job. It is more complex than that, with people moving from job search to economic inactivity and back, alongside a more modest uptick in the numbers in work.
Also, in RBS research published earlier this week, the increase in the "in work" category has largely comprised those in self-employment, taken over the past eight years.
That should not be read as a sign of confidence from business and recruiters. There are many reasons for going self-employed - positive ones, for good pay and flexibility, and through necessity, for lower and uncertain pay.
The ONS said the figures showed "continued labour market improvement".
Scotland saw the second-largest increase in the employment rate across the UK, behind only Wales.
In its employment and labour market report, the ONS said: "The large increase in Scotland is partially due to some estimates at the start of the year much lower than suggested by other recent figures, with the underlying pattern mostly flat."
The Scottish government said Scotland continued to outperform the UK on female and youth employment.
Keith Brown, the Cabinet Secretary for Economy, Jobs and Fair Work, said: "These encouraging figures continue to show that the fundamentals of the Scottish economy are strong, with a 51,000 rise in the employment level and a drop of just over 1 percentage point in the unemployment rate over the quarter, taking it below that of the UK average.
"While these figures are welcome, the Scottish government is absolutely committed to taking further action. Our Labour Market Strategy shows that there is still more that we can and will do."
Mr Brown said the government's planned Â£500m Scottish growth fund would further support the workforce and allow the economy to grow.
But he added that Brexit posed a "real and direct risk" to economic recovery in Scotland.
The small business support organisation, FSB, said most Scottish firms had been "getting on with business" since the vote to leave the EU in June.
Andy Willox, the FSB's Scottish policy convenor, said: "While these figures are encouraging, smaller businesses and the self-employed still need support from governments in Edinburgh and London.
"The upcoming autumn statement will be a great opportunity for the new chancellor to show that he backs the UK's army of smaller firms.
"Further, the Scottish government's current enterprise and skills review must make agencies put the needs of small and growing businesses at their core."


Prime Minister Theresa May will meet US President Donald Trump in Washington DC on Friday, the White House has said.

Mrs May will be the first foreign leader to meet the new president after his inauguration.
A post-Brexit free trade deal is thought likely to be high on her agenda as she travels to the US for talks.
Confirmation of the meeting came as hundreds of thousands of people around the world joined women's marches to protest Mr Trump's presidency.
Mr Trump's press secretary Sean Spicer gave details of Mrs May's visit in his first briefing to journalists at the White House on Saturday.
Earlier, while visiting the CIA's headquarters, President Trump said the PM "is coming over to our country very shortly".
Nato, the European Union, defence and Russia are all likely to be discussed in the meeting.
The BBC's political correspondent Iain Watson said the "symbolism will be very important" and with Brexit negotiations about to get under way, the fact Mrs May will be meeting the new president so soon will be "politically significant".
Our correspondent said there had been a lot of effort to make sure Mrs May was one of the first leaders President Trump would meet.
In December the PM's joint chiefs of staff, Nick Timothy and Fiona Hill, travelled to the US to build links with the incoming president's team ahead of his inauguration on 20 January.
Theresa May congratulates Trump on taking office
In a statement issued after the inauguration, Mrs May said: "From our conversations to date, I know we are both committed to advancing the special relationship between our two countries and working together for the prosperity and security of people on both sides of the Atlantic.
"I look forward to discussing these issues and more when we meet in Washington."
Mrs May has promised to hold "very frank" discussions with Mr Trump.
She told the Financial Times she believed the new president recognised the importance and significance of Nato and the "importance of the co-operation we have in Europe to ensure our collective defence and collective security".
On the day after his inauguration, at least 500,000 people gathered for a rally outside the US Capitol building in Washington while organisers said an estimated 100,000 descended on central London on Saturday as similar events were staged in major cities across the US and around the world.


The FA Cup quarter-finals between Chelsea and Manchester United and Tottenham and Millwall will be broadcast live on BBC One.

Premier League leaders Chelsea will host Jose Mourinho's United on Monday, 13 March with kick-off at 19:45 GMT.
Mauricio Pochettino's Tottenham welcome League One Millwall on Sunday, 12 March at 14:00 GMT.
BT Sport will broadcast non-league Lincoln's trip to Arsenal on Saturday, 11 March (17:30 GMT).
The game between Middlesbrough and the winner of the fifth-round replay between Manchester City and Huddersfield will also be live on BT Sport on Saturday, 11 March at 12:15 GMT.


Andy Murray dismantled Colombian Santiago Giraldo's hard-hitting game to claim his 499th career win and reach round four at the Miami Open.

The Briton, seeded third, won 6-3 6-4 and will play South Africa's 15th seed Kevin Anderson in the last 16.
Another victory would make Murray the 46th man in the open era to reach 500 match wins.
Fernando Verdasco beat Rafael Nadal 6-4 2-6 6-3, while women's top seed Serena Williams beat Cici Bellis 6-1 6-1.
Murray, 27, lost heavily to Giraldo in Madrid last year but made amends in Miami, where he lives and trains for much of the year.
The Scot attacked his opponent's second serve from the outset, breaking in game six on his way to the first set and then powering 4-0 clear in the second.
There was a late revival from the now free-swinging Giraldo, who saved two match points and broke serve at 5-2 and saw off another two at 5-4.
It delayed Murray but did not derail him, and the world number four finally sealed victory at the fifth attempt thanks to a net cord.
Looking ahead to a potential landmark win on Tuesday, Murray told BBC Sport: "Getting to 500 wins is a lot. There's not loads of players that have done it.
"Hopefully it happens in a couple of days, if not then hopefully later on in the year I'll win another match and have the opportunity to win many more.
"It's a nice milestone to reach when I get there."
Rafael Nadal admitted he was "playing with too much nerves" after losing 6-4 2-6 6-3 to fellow Spaniard Fernando Verdasco.
World number 34 Verdasco, 31, has now won his last two matches against Nadal.
The second seed said recent injury problems were not to blame for his exit, and explained: "The physical problems are in the past. Now I need to fix again the nerves, the self-control on court.
"I'm going to fix it, I don't know if in one week, in six months, or in one year, but I'm going to do it."
Serena Williams took just 42 minutes to see off 15-year-old wildcard Cici Bellis, the junior world number one.
Bellis, ranked 211th by the WTA, remains an amateur despite beating Dominika Cibulkova at the US Open last year, and she saw off 29th seed Zarina Diyas in her opening match in Miami.
Williams, 18 years older than her compatriot, was not about to fall victim to another upset and won 6-1 6-1 in windy conditions.
"It was a good match, she plays really well and I'm just out here trying to take the title," said Williams. "It's just good to see another American doing well."
Gael Monfils saw off fellow Frenchman Jo-Wilfried Tsonga 6-4 7-6 (7-4), and compatriot Adrian Mannarino beat seventh seed Stan Wawrinka of Switzerland.
Eighth seed Tomas Berdych, of the Czech Republic, beat Australia's Bernard Tomic 6-7 (4-7) 7-6 (7-3) 6-1.
In the women's draw, Serbian fifth seed Ana Ivanovic was beaten 7-6 (7-4) 7-5 by German Sabine Lisicki and third seed Simona Halep, of Romania, defeated Italian Camila Giorgi 6-4, 7-5.
Italy's Flavia Pennetta, the 15th seed, defeated two-time champion Victoria Azarenka of Belarus 7-6 (7-5) 7-6 (8-6).


Finnish Punk band PKN, the first Eurovision act to all have learning difficulties, have been knocked out of the contest in the first semi-final.

They are one of six entries going home, along with Danish boyband Anti Social Media - the first time Denmark has failed to get to the final since 2007.
Ten acts - Russia, Serbia, Armenia, Belgium, Greece, Estonia, Hungary, Albania, Romania and Georgia - are all through to Saturday's final in Vienna.
Netherlands also made a surprise exit.
Last year their act, The Common Linnets, came second in the contest.
Fans of PKN (Pertti Kurikan Nimipaivat) reacted angrily to news they had not been voted through to the final, after they ranked among early favourites with bookmakers.
George Parry tweeted: "Finland didn't make it through to the #Eurovision final. Tantrum time. #sodisappointed."
Nitin Sood â€


Police in Italy say they have dismantled an international ring that conspired to kidnap children involved in custody battles.

A police statement said those involved were special forces veterans whose commando-style tactics "put the child's life at risk".
They charged tens of thousands of dollars for the abductions from North Africa to Europe using high-speed boats, police said.
Several people have been arrested.
They have been named as Luigi Cannistraro, Antonio Barazza, Sebastiano Calabrese and a former Ukrainian sailing champion, Larysa Moskalenko.
It is alleged that Ms Moskalenko provided the boats for the crossings.
The group carried out its first operation in October last year when a child was abducted in Tunisia, and taken to Norway via Sicily.
A second operation in November was foiled by police who intercepted the phone calls of Ms Moskalenko's sailing venture in Palermo.
Further operations were planned in Cyprus, Lebanon and Egypt.
Two Norwegians and a Swede are also being held in Tunisia.  They have been named as Elisabeth Wenche Adresen, Martin Vage and Per Ake Helgesson.
The BBC's Alan Johnston in Rome says they could face kidnapping and human trafficking charges.


Welsh qualifier Ryan Day will face four-time champion John Higgins in the first round of the World Snooker Championship.

Day beat 1997 World Champion Ken Doherty 10-6 at Pond's Forge on Wednesday to reach The Crucible.
Mark Williams - winner in 2000 and 2003 - faces 2006 champion Graham Dott in his first round game.
And Michael White completes the Welsh contingent against England's world number 59-ranked Sam Baird.
The other highlights of the first round see defending champion Stuart Bingham playing Ali Carter and five-time champion Ronnie O'Sullivan face Dave Gilbert.
World number one Mark Selby plays Robert Milkins and Judd Trump meets Liang Wenbo.
The tournament starts on Saturday, 16 April.
Full draw
Stuart Bingham v Ali Carter
Stephen Maguire v Alan McManus
Ricky Walden v Robbie Williams
John Higgins v Ryan Day
Judd Trump v Liang Wenbo
Martin Gould v Ding Junhui
Mark Williams v Graeme Dott
Neil Robertson v Michael Holt
Shaun Murphy v Anthony McGill
Marco Fu v Peter Ebdon
Barry Hawkins v Zhang Anda
Ronnie O'Sullivan v David Gilbert
Mark Allen v Mitchell Mann
Joe Perry v Kyren Wilson
Michael White v Sam Baird
Mark Selby v Robert Milkins


Charlotte Dujardin and Valegro won the dressage Grand Prix Special at the World Equestrian Games, setting up a bid for freestyle gold on Friday.

Media playback is not supported on this device
The special test is an event in its own right but also a qualifier for the showpiece freestyle test, set to music.
Dujardin scored 86.120%, well clear of Germany's Helen Langehanenberg who recorded 84.468% for second.
"It was a great ride. I had no team members to worry about, I thought I'd just go for everything," said Dujardin.
Dujardin and Valegro had already been instrumental in securing Britain team silver in Normandy on Tuesday, which also guarantees Britain's place at the Rio 2016 Olympics.
Their score in Wednesday's special was the highest ever achieved by a horse and rider in that event at a World Equestrian Games - despite a bowel movement from Valegro mid-routine.
"I made three expensive mistakes - he needed to go to the toilet at the wrong time," admitted Dujardin, 29.
"That does happen but it's a bit easier if you're cantering or doing something else, not walking and trying to go into piaffe. That's not the easiest move - it was just unfortunate.
"The crowd were very hard to deal with. All I could hear were gasps, whether I did a good thing or a bad thing. I could hear the crowd the whole time in my head and it was very hard to concentrate."
Fellow British rider Carl Hester and Nip Tuck, an inexperienced horse making large strides in terms of performance, will join Dujardin in Friday's freestyle having finished 12th, as will Michael Eilberg and Half Moon Delphi in 13th.
"I love the freestyle and absolutely love my new music. I'm hoping I can pull it off here," Dujardin told BBC Sport.


Some of the pylons for Anglesey's planned Wylfa Newydd nuclear power station will follow a route close to existing power lines.

National Grid has consulted on routes for the cables to run between the station and to the east of Llangefni.
It said its chosen route would "keep the effects of the new connection" as low as it could.
Plans to connect Wylfa Newydd at Cemaes Bay to a substation at Pentir, Gwynedd, have proved controversial.
Campaigners have been concerned about the impact of pylons on the countryside.
Last year, the National Grid said it would use underground cables instead of pylons under the Menai Strait between Anglesey and the mainland.
It has also confirmed up to three miles (5km) of underground cables with no pylons close to Gaerwen and Bangor.
For the latest section of the route, the National Grid said it had taken feedback into consideration following a consultation.
"People said if an overhead line was progressed, that we should keep close to the existing line," it added in a statement.
The National Grid has published an interactive map showing the proposed routes of the power cables.


The Conservative candidate for South Thanet has been charged with allegedly overspending in the 2015 General Election campaign.

Craig Mackinlay, who is running again on 8 June, stands accused under the Representation of the People Act 1983, alongside his election agent Nathan Gray and party activist Marion Little.
He said he had done nothing wrong and questioned the timing of the decision.
Other Tory candidates were investigated but no charges were brought.
Prime Minister Theresa May said: "The Conservative Party continues to believe that these allegations are unfounded.
"Craig Mackinlay is innocent until proven guilty and he remains our candidate."
If found guilty, Mr Mackinlay could face a maximum sentence of one year in prison, BBC Home Affairs correspondent Danny Shaw said.
Police forces have been investigating whether MPs' agents should have filed costs for battle bus visits to constituencies under local expenses.
The Conservative Party said they had been campaigning "across the country for the return of a Conservative government" and, as a result, associated costs were regarded as national and not local expenditure.
It added that election laws were confused and unclear and the party was committed to strengthening future electoral laws.
Mr Mackinlay, who is 50, his agent Nathan Gray, 28, and Marion Little, a party activist, 62, have each been charged with offences under the Representation of the People Act 1983 and are due to appear at Westminster Magistrates' Court on 4 July 2017.
In May the CPS announced that no criminal charges would be brought against more than 20 Conservative MPs in connection with the national party's failure to declare expenses for its battle bus campaigns.
Investigations were launched after a Channel 4 investigation into election spending.
Complex rules require parties to disclose national spending separately from the funds used to promote candidates, and separate national and local spending limits apply.
A statement on Mr Mackinlay's Facebook page said: "My candidature in South Thanet is entirely unaffected and my campaign continues as before."
"I have done nothing wrong and acted honestly and properly whilst a candidate in 2015, as all candidates do, [and] acted upon advice throughout."
Mr Mackinlay said it was a "shocking decision" by the CPS.
He said: "I am very disappointed with the way this has been handled by the CPS and Kent Police and I must question the timing of this decision given that Kent Police confirmed on 18 April that their file had been sent to the CPS to review and make their decision: Why leave this until a few days before the election?"
It may feel like a curve ball this close to polling day, but in electoral terms the decision to charge Craig Mackinlay means no change.
Postal ballots have already been sent out, the deadline for withdrawing nominations has passed, so there is no choice for the Conservatives to make, even if they wanted to: Craig Mackinlay will be the party's  candidate on the ballot paper in South Thanet.
If he were to win, he would also be able to take his seat like any other MP; being charged with a criminal offence does not preclude that.
The Conservative Party could always decide to withdraw the whip, leaving him as an Independent, but that is unlikely in this case.
Nick Vamos, CPS head of special crime, said Kent Police had handed a file of evidence to it on 18 April and the CPS had asked for further investigation "in advance of the 11 June statutory time limit by when any charges needed to be authorised".
He added: "We have concluded there is sufficient evidence and it is in the public interest to authorise charges against three people."
The 2015 election saw Mr Mackinlay elected as MP for South Thanet beating Nigel Farage, then UKIP leader, into second place.
Commenting on the CPS decision, Mr Farage said he was pleased someone had been charged and he predicted the Conservative vote in South Thanet would collapse.
He said: "I think that constituency will now be a straight fight between UKIP and the Labour Party."
Mr Farage also said: "Once again, it is bad judgement from Theresa May.
"Why on earth would you allow someone to go ahead as General Election candidate when this cloud was clearly hanging over him?"
Labour leader Jeremy Corbyn said the Tories' decision to comment on the case could be seen as "interference" in an independent process.
He said: "Nobody should be commenting on the details of an ongoing case, the police must be allowed to act independently, to investigate on the basis of any evidence they've got and the Crown Prosecution Service must be allowed to make its decision on whether to proceed on a case.
"I think it is a very bad road when democratically elected politicians start offering a running commentary on independent judicial processes. We have to have total separation of political and judicial powers in this country."


Three senior opposition politicians in Mexico have been targeted by spyware on their mobile phones, researchers say.

An internet watchdog based in Canada, Citizen Lab, said the surveillance software is only sold to governments.
Last week, Citizen Lab also said that 12 journalists and human rights lawyers had been targeted.
At the time, the Mexican president, Enrique PeÃ±a Nieto, described accusations that the government was involved as false.
Mr PeÃ±a Nieto said surveillance software was only used for matters of national security and for fighting organised crime.
He added that he had ordered an investigation by the attorney general's office.
Citizen Lab said the head of the Conservative National Action Party (PAN), Ricardo Anaya, a PAN Senator, Roberto Gil Zuarth, and the party's communications secretary, Fernando Rodriguez, were targeted.
"There is strong circumstantial evidence implicating the government of Mexico", the watchdog said.
The software, known as Pegasus, was sold to Mexican federal agencies by the Israeli company NSO Group on the condition that it only be used to investigate criminals and terrorists.
It is usually sent in a text message to a smartphone.
If the person taps on it, the spyware is installed, and huge amounts of private data - text messages, photos, emails, location data, even what is being picked up by the device's microphone and camera - are hacked.


1899 - Germany cedes the northern Solomon islands to the United Kingdom, which had declared a protectorate over the southern Solomon islands in 1893.
Quest for land and power fuelled ethnic violence
2003: In pictures - Solomon Islands violence
2004: Solomons enjoy new-found stability
1942 - During World War II the islands are occupied by Japan. There is very heavy fighting, especially on and around Guadalcanal. The Japanese are forced from the islands by the Allies in 1945, and British rule is restored.
1946 - An independence movement, Marching Rule, is established.
1976 - The islands become fully self-governing.
1978 - The islands achieve independence within the British Commonwealth. Queen Elizabeth II remains head of state.
1988 - Solomon Islands join Vanuatu and Papua New Guinea to form the Spearhead Group, which aims to preserve Melanesian cultural traditions.
1997 - Bartholomew Ulufa'alu, a Malaitan, is elected prime minister.
1998 - Ulufa'alu's government narrowly survives a motion of no confidence. The Isatubu Freedom Movement, which says it represents the native people of Guadalcanal, begins to forcibly evict Malaitans, whom they accuse of taking jobs and land. The Malaitan Eagle Force (MEF) is formed in response. At least 20,000 Malaitans are forced off Guadalcanal. Fighting breaks out between the two rival militias.
2000 June - The MEF stages an attempted coup. It takes Bartholomew Ulufa'alu hostage. He is subsequently forced to resign and replaced by Mannasseh Sogavare.
Former Prime Minister Bartholomew Ulufa'alu
2000 October - A broad peace treaty between the two militias, brokered by Australia, is signed. Unarmed peacekeepers from Australia and New Zealand are deployed to supervise the handover of arms, many of which were bought after fighting on the island of Bougainville in Papua New Guinea ended in 1998.
2001 February - Marau peace agreement is signed bringing together the two warring factions, Marau Eagle Force and Isatabu Freedom Movement. It is aimed at ending two years of conflict.
2001 September - Murder of prominent rebel leader Selwyn Sake of the Isatabul Freedom Movement threatens peace agreement.
2001 December - Sir Allan Kemakeza of the People's Alliance Party is elected prime minister. International donors, including Australia and New Zealand, urge him to make law and order his priority.
2002 - Economic, social problems worsen, with the government unable to pay wages and fund services. In March, international peace monitors withdraw from some posts amid growing lawlessness. In August, a government minister is shot dead on the orders of a tribal warlord.
2002 December - Cyclone Zoe devastates the remote island of Tikopia and its neighbour, Anuta. A relief vessel is despatched amid fears of a large-scale loss of life, but it emerges that nobody was killed.
2003 June - Prime Minister Kemakeza asks for military help from Australia, New Zealand as country threatens to spiral into anarchy. Pacific foreign ministers back a multinational force. Solomons government approves peacekeeping plan in July.
Notorious rebel Harold Keke surrendered to peacekeepers
Profile: Harold Keke
2005: Solomons rebel jailed for murder
2003 July - Australian-led peacekeeping force deploys, aiming to restore order and disarm militant groups.
2003 August - Prominent rebel Harold Keke - leader of the Isatubu Freedom Movement - surrenders to Australian forces. He is charged with the 2002 murder of priest and MP Father Augustine Geve.
2003 October-November - Australia, New Zealand decide to scale back their military contributions, citing progress in restoring order. Peacekeepers declare the Weather Coast - an area badly hit by lawlessness - safe.
2005 March - Former rebel leader Harold Keke and two of his associates are jailed for life for the 2002 murder of MP Father Augustine Geve.
2006 May - Parliament elects Manasseh Sogavare as prime minister. His predecessor, Snyder Rini, resigned after eight days in office. Rioting in the capital followed his appointment.
2007 April - A tsunami hits the north-west Solomon Islands after a strong sea quake. The UN puts the death toll at 34. Thousands are left homeless.
Members of Parliament are sworn-in at the opening session of parliament in the capital, Honiara
2007 July - Controversy as lawyer Julian Moti - wanted in his native Australia on child sex charges - is appointed as attorney general. He is later extradited.
2007 December - Nine ministers defect to the opposition. Prime Minister Sogavare loses a vote of confidence and steps down; MPs pick Derek Sikua as premier.
2009 February - The Solomon Islands declare a national disaster after heavy rain and flooding claim lives on Guadalcanal island, and people are evacuated from there and nearby Savo island.
2009 April - A national truth and reconciliation commission is launched to investigate the conflict between rival ethnic militias in which more than 100 people died and 20,000 were displaced between 1997 and 2003 on Guadalcanal.
2010 January - About 1,000 people are left homeless by landslides and a tsunami triggered by an earthquake in the Solomon Islands.
2010 August - General elections. Danny Philip becomes prime minister.
2011 November - MPs elect Gordon Darcy Lilo as prime minister, days after he was sacked as finance minister. Former PM Danny Philip resigned after he lost his majority in parliament over the dismissal.
2011 December - Australian High Court dismisses prosecution on child sex charges of former Solomon Islands attorney-general Julian Moti, ruling that his 2007 deportation to Brisbane was illegal.
2013 February - A powerful earthquake sets off a tsunami that leaves at least nine people dead.
2013 July - The Regional Assistance Mission to the Solomon Islands (RAMSI) marks the 10th anniversary since its deployment on the island. It also ends its military phase.
2014 April - Heavy rains brought by tropical cyclone Ita cause some of the worst flash flooding in Solomon Islands history. At least 22 people are killed.
2014 October - A month before elections, MPs reaching the end of their terms receive huge payouts because of an irreversible error by finance officials.
2014 November - Prime Minister Gordon Darcy Lilo unexpectedly loses his seat in the general election. Of the 50 elected MPs, 32 are independents. Under new legislation only registered parties can form coalitions. With only half of the 12 registered parties fielding successful candidates, MPs must build a governing coalition and choose a prime minister.
2014 December - Veteran politician Manasseh Sogavare is elected prime minister for a third time in a secret ballot by MPs.


Polish MPs will be offered military training because of fears that the war in Ukraine could spread.

Parliamentary Speaker Radoslaw Sikorski announced that parliamentarians will be trained at an army firing range.
The country's military age is capped at 50 but exceptions will be made for "healthy and youthful looking" MPs.
Poland's recently adopted security strategy states that the country is threatened by warfare and names Russia as an aggressor.
Speaker Sikorski said he hopes the training would demonstrate to young Poles that it was time to start preparing to defend the country. He added that these are "troubled times".
Polish Defence Minister Tomasz Siemoniak has called on Poles aged between 18 and 50 to undergo voluntary military training.
The offer comes after Krystyna Pawlowicz, a 63-year-old MP, asked to be given military training to provide an example to others.
Warsaw has been a firm opponent of Russia's actions in Ukraine and many Poles are concerned the country could come under attack.
An opinion poll from May last year found 61% of respondents felt the Ukraine crisis threatened Poland's security. In another poll from April, when asked which country Poland should most fear, 80% of respondents said Russia, up from 49% in 2010.
On Thursday, a top Polish official said that arming the Ukrainian army could stop the conflict in eastern Ukraine escalating.
Stanislaw Koziej, the head of Poland's National Security Office, said that it was in the "interest of Europe, of Poland and of Ukraine to strengthen Ukraine's army and to supply it with weapons."
So far Poland has only offered non-lethal supplies and training to the Ukrainian government.


Leicester Tigers prop Marcos Ayerza is expected to be out for up to three months with an ongoing back problem.

The 34-year-old Argentine has compressed nerves in his back and needs to see a specialist.
Interim head coach Aaron Mauger said: "It's precautionary trying to make sure we don't aggravate it and will probably be 10-12 weeks to get him back."
Meanwhile, centre Matt Toomua could return before the end of the season following his knee injury.
Mauger said the 34 year-old had "progressed very well".
"Matt is a couple of weeks ahead of where we thought he would be," Toomua added. "Hopefully he will play some rugby in April."


A medieval sapphire ring found by metal detectorists in a field in Derbyshire has sold at auction for £3,600.

The gold stirrup-shaped ring with a blue gem at its centre was discovered in Belper and dates back to 1250.
Hansons Auctioneers said the ring's style was popular among wealthy members of the clergy and may have been lost during a religious festival.
A spokeswoman said despite a lot of interest from North America the ring was sold to a man in the UK.
Live updates and more from Derbyshire
The piece of jewellery had a guide price of between £1,500 and £2,000.
Adam Staples from the auctioneers' history department said the blue of the sapphire is linked to the Virgin Mary and suggested those of faith "may attain celestial bliss".
He said: "It does also reveal how powerful the Church was during this period, as to possess such an item would have been a sign of significant wealth of success.
"It is amazing to believe it has survived that long in such good condition and hadn't been hit by a plough."
The ring weighs about four grams (0.14 oz) and is heavier than others typical of this period, the expert added.


Adil Rashid took 4-19 as T20 Blast North group leaders Yorkshire successfully defended 152-8 to inflict a sixth successive defeat on Durham.

Durham recovered from 76-6 to make 128-7 thanks to Stuart Poynter's unbeaten 35, but Rashid's spell proved decisive.
David Willey had earlier hit 44 from 27 balls for Yorkshire, while ex-England all-rounder Paul Collingwood took 3-32.
Elsewhere, Worcestershire beat in-form Nottinghamshire, while in the South group Somerset beat Hampshire.
Rashid has been overlooked for the England Test team this summer, but his variety and guile was too much for a Durham side who have now lost all six of the T20 Blast fixtures this season.
Willey's three sixes and four fours helped Yorkshire make a steady start on a slow pitch and Shaun Marsh (36) saw them surpass the 150-mark.
The wily bowling of 41-year-old Collingwood saw the Jets in with a chance, but Rashid ripped through the middle order and the visitors were always well behind the run rate.
Worcestershire held their nerve to defend 208-8 and earn a 13-run win over Nottinghamshire at Trent Bridge.
Notts were chasing a fourth consecutive T20 Blast win, having lost their first two matches.
However, Joe Clarke top-scored with 60, hitting seven fours and three sixes at the top of the innings as the Rapids went past 200.
England opener Alex Hales was in devastating form as Notts started strongly, putting on 93 with Riki Wessels (49).
But when Hales fell for 63 from 27 balls, the run rate slowed, with John Hastings (3-31) doing most of the damage as Notts faltered to 195-5.
Somerset made the most of a flying start on their way to 204-9 and a 14-run victory against Hampshire.
Lewis Gregory hit 43 from 20 balls and Steven Davies 32 from 13 as the hosts put on 71 by the time Shahid Afridi had Davies caught by James Vince after 4.4 overs.
Jim Allenby (37) and some brief but valuable contributions further down the order helped them surpass 200 with Gareth Berg (3-35) the pick of the bowlers.
Vince managed 33 from 15 balls in a promising reply by Hampshire. But he finished as the top scorer, with Roelof van der Merwe, Max Waller and Tim Groenewald all taking two wickets as the visitors were dismissed for 190.


The number of dog attacks on postal workers in the UK is at an "unacceptable" level, a union has said.

A new Royal Mail survey revealed there were more than 2,600 attacks across the country in the last year.
Nottinghamshire had the highest number of attacks - 68 between April 2015 and April 2016 - the report indicates.
The Communication Workers' Union said more than a third of attacks happen at the front door and "irresponsible" owners risk fines, or a jail term.
The number of dog attacks rises by 10% during the school holidays, when dogs are more likely to be in gardens unsupervised, the Royal Mail said.
Its research confirms that in the last year, 36% of attacks on staff happened at the front door, while 35% took place in the front garden - the equivalent to 1,888 attacks.
Nottingham, Nottinghamshire - NG Postcode: 68 - up 6% on the previous year. The NG postcode includes Grantham in Lincolnshire.
Peterborough, Cambridgeshire - PE: 65 - rise of 5%. Postcode includes; Skegness in Lincolnshire and Hunstanton in Norfolk.
Northern Ireland (uses one postcode) - BT: 56 - down 13%
Tonbridge, Kent - TN: 56 - up 2%. Postcode includes Hastings in East Sussex.
Reading, Berkshire - RG: 54 - up 86%. Postcode includes; Basingstoke in Hampshire and Henley-on-Thames in Oxfordshire.
Leeds, West Yorkshire - LS: 51 - down 4%
Sheffield, South Yorkshire - S: 51 - down 39%. Postcode includes Chesterfield in Derbyshire and Worksop in Nottinghamshire.
Plymouth, Devon - PL: 50 - down 8%. Postcode includes Padstow in Cornwall.
Guildford, Surrey - GU: 48 - down 4%. Postcode includes; Alton in Hampshire and Petworth in West Sussex.
Newcastle, Tyne and Wear - NE: 48 - up 17%. Postcode includes Belford in Northumberland.
Derby, Derbyshire - DE: 46 - rise of 21%
Tony Fox, operations director for Royal Mail, said: "We know that the overwhelming majority of dogs are friendly most of the time, however, even the most placid animal will defend itself if it feels its territory is being threatened."
Dave Joyce, of the CWU, said: "The vast majority of our customers and their dogs aren't a problem but irresponsible and reckless dog owners are.
"The new dog control laws now identify and penalise chronically irresponsible dog owners.
"One owner was recently fined Â£8,800 after his dog injured a postwoman as she put letters through the door."
TV presenter and dog lover Paul O'Grady, who is backing a campaign to reduce the number of dog attacks, said: "No one should feel unsafe in the workplace and it's important we as dog owners, take the necessary steps to give postmen this same respect."
Royal Mail delivers to over 29 million addresses in the country.


An Army culture that has problems with sexualised behaviour and harassment may take years to change, a senior military witness has told an inquest.

Brigadier John Donnelly said there must be a cultural shift, but change would take "a few years".
The inquest in Woking into the death of a teenage recruit at Deepcut barracks in Surrey has heard she was the subject of unwanted sexual conduct.
Pte Cheryl James was found dead with a bullet wound to the head in 1995.
The 18-year-old from Llangollen, Denbighshire, was one of four recruits to die at the base in seven years.
The inquest heard a survey two years ago of 24,000 service men and women found the majority of respondents thought the Army had an overly sexualised culture.
Brig Donnelly, head of Army Personal Services, said the results had been a "wake-up call".
The survey also suggested serving soldiers did not have faith in their own complaints system.
Questioned by Alison Foster QC, representing the family, Brig Donnelly admitted this "troubled" him.
He said a number of changes had been made throughout the Army as a result of the death of Pte James and three other recruits who died between 1995 and 2002.
They included a confidential support line, a female-focused officer attached to each unit to provide advice, and better awareness of how to make complaints.
"We recognise that a number of changes have taken place since 1995," he said.
"We got some things wrong and we took too long to recognise that and I have apologised to Mr James [Pte James's father]."
Who were the Deepcut four? Background to the deaths and timeline of events.
In a wider context, he spoke of other changes including a policy at Deepcut where no trainees were expected to undertake guard duty, as Pte James had been doing at the time of her death.
"We recognise that trainees in large part were not ready to take on guard duty," he said.
Supervising ratios are also now "vastly different" to those when Pte James was there, he said.
The inquest heard that in 1995 there was often just one corporal in charge of 200 trainees - but one warrant officer second-class who was at Deepcut between 1995 and 1998 had seen one non-commissioned officer in charge of 300 to 400 recruits.
Pte James's boyfriend, Simeon Carr-Minns, told the inquest how she had claimed she had been assaulted by a fellow soldier, known as soldier B.
He said soldier B had propositioned Pte James while she was on restriction of privileges at Leconfield army barracks but she "fobbed him off".
Mr Carr-Minns gave a statement about it to Surrey Police when they investigated Pte James's death in 2002 and 2003.
He told officers a soldier had come on to her "sort of groping maybe or a bit of innuendo".
He also said Pte James felt soldier B was picking on her and she said she found him "creepy".
Mr Carr-Minns said he complained on his girlfriend's behalf to a sergeant the day after she told him.
An initial inquest into Pte James's death in 1995 recorded an open verdict, but that was overturned by the High Court which ordered the new hearing.
The inquest was adjourned until Monday.


US President Donald Trump has climbed down on past threats and agreed to honour the so-called "One China" policy.

He backed the long-standing agreement during a call with Chinese President Xi Jinping, the White House said.
The One China policy states that there is only one Chinese government.
Mr Trump broke with diplomatic norms in December, by accepting a call from the president of Taiwan, considered a breakaway province by China.
As president-elect, Mr Trump also said he saw no reason why the agreement should continue without key concessions from Beijing.
China retaliated to the Taiwan phone call by making an official complaint to the US.
Read more on this story:
The telephone conversation on Thursday night was the first between the two since Mr Trump took office on 20 January, though the new US president has called several other national leaders.
On Friday, Mr Trump said the conversation was "very warm".
He added: "We had a very, very good talk last night, and discussed a lot of subjects. It was a long talk."
He made the comments during a press conference at the White House with Japanese Prime Minister Shinzo Abe.
The White House said a wide range of issues were discussed during the US-China call, which it characterised as "extremely cordial". The two leaders had invited each other to visit, it said.
A statement from Beijing said China appreciated Mr Trump's acknowledgement of the One China policy, calling the two nations "co-operative partners" who could "push bilateral relations to a historic new high".
Taiwan, meanwhile, said it would continue "close contact" with the US, pointing out that maintaining good ties with Washington and Beijing was key to regional stability.
Mr Trump has caused concern in Beijing with his stance on trade and the South China Sea, but it was his decision to accept a call from Taiwanese President Tsai Ing-wen that triggered most alarm.
Though the US is Taiwan's main military ally, no US president or president-elect had spoken directly to a Taiwanese leader for decades.
Under the One China policy, the US recognises and has formal ties with China rather than Taiwan.
Mr Trump had indicated that policy could change, suggesting the US should not abide by One China unless it secured concessions from Beijing on trade.
Comments by Secretary of State Rex Tillerson on China's military build-up in the South China Sea further chilled ties. He suggested that the US should block access to artificial islands China is building in disputed waters.
Chinese officials have reacted relatively calmly to remarks from the new administration, though they lodged an official protest over the Taiwan phone call.
But the Taiwan issue is very sensitive, something state media made clear when it accused Mr Trump of "playing with fire".
The telephone call followed a letter sent by Mr Trump to Mr Xi on Thursday - the president's first direct approach to the Chinese leader. In it, Mr Trump said he looked forward to "constructive relations".
The New York Times reports that it was hand-delivered to China's ambassador by National Security Adviser Michael Flynn, who had also spoken to China's top foreign policy official last week.
There were other signs that the White House was seeking to stabilise ties, such as Ivanka Trump attending a Lunar New Year celebration at the Chinese Embassy in Washington.
At a press briefing, Chinese Foreign Ministry spokesman Lu Kang declined to answer whether Mr Trump's acknowledgement of the One China policy had been a condition of the call.
The content of the phone call between Mr Trump and Mr Xi will be celebrated in Beijing as signalling a return to the traditional framework of the US-China relationship.
Three weeks into the new American administration, after a score of phone calls between Mr Trump and other world leaders, China's absence from the list was becoming ever more conspicuous.
Many Chinese citizens see Taiwan as the last piece in China's territorial jigsaw. Any further move towards independence and international recognition for the island would have represented a dangerous humiliation for Mr Xi.
With the presidential phone call, Beijing can draw a line under such fears. Three weeks in, it has won a clear and unequivocal commitment from the Trump administration to honour the One China policy.
However, it is not clear what, if anything, the Trump administration has won in return.


Nigeria international defender Juwon Oshaniwa says he is determined to fight for a place in the Hearts first team after falling out of favour at the Scottish Premiership side.

Oshaniwa, 26, signed a three-year contract when he arrived at Hearts in the summer of 2015, making 25 appearances in his first season.
But the left-back, who has 17 caps and played in all of the Super Eagles' matches at the 2014 World Cup in Brazil, has not featured for the club this season.
I can't give up. I know giving up is not an option so I'll keep up the fight
"Things change quickly in football and I can only keep on fighting to get my chance," Oshaniwa told BBC Sport.
"People have been asking me what's going on in Scotland, and the only explanation I can give is that - this is football.
"When I joined up with the Nigerian squad in England [last month] it's the same question but I believe with hard work I'll get another chance."
Oshaniwa and his compatriot, Celtic defender Efe Ambrose, won the 2013 African Cup of Nations with Nigeria in South Africa, but have both fallen off the international radar due to club inaction.
While Ambrose has dropped down a division to play on loan at Hibernian, Oshaniwa - who has a contract with Hearts until May 2018 - is still keen to prove himself at Tynecastle.
He added: "I can't give up. I know giving up is not an option so I'll keep up the fight.
"I still want to represent my country and its only regular football at my club that will earn me regular call-up."


Drugs that rapidly tweak the body clock in order to avoid jet lag and the pains of shift work have moved a step closer after research in Japan.

The team at Kyoto University has found the clock's 'reset button' inside the brain.
Their study, published in the journal Science, showed the button could be used to switch the clock to a new time zone in a single day.
Experts said the team was "close to the money" in the hunt for a jet lag cure.
There are clocks throughout the body and a "master clock" in the brain, keeping the body in sync with the world around it to make people sleepy at night.
Anyone who has ever done shift work or a long-haul flight has experienced the disrupted sleep and hunger patterns of a body clock which is out of tune with the rising and setting of the sun.
The clock uses light to help keep track of time, but it is naturally stubborn and adjusts slowly.
The rough rule is that for every time zone crossed it takes a full day for the body to catch up. Fly from London to Beijing and it would take a week for the body clock to fully adapt.
The team in Japan have come up with a way to get the master clock to be a bit more flexible.
It is a group of 10,000 brain cells - about the same size as a grain of rice - which constantly talk to each other to keep a strict control over the time.
The scientists found that interfering with the vasopressin receptors, essentially a brain cell's ears that allow it to keep in touch with its neighbours, let the clock shift rapidly.
Genetically modified mice which had no vasopressin receptors were able to adjust to the clocks being put back eight hours within a single day, while normal mice took six days.
When the clocks were put forward eight hours then it took normal mice eight days to adapt, but those without vasopressin receptors adjusted in two.
Similar results were then achieved in normal mice using a drug.
The study's authors concluded: "Studies have shown that chronic jet lag and rotating shift work can increase an individual's risk of developing hypertension, obesity, and other metabolic disorders.
Sources: Mental Health Foundation and BBC Science
Discover what disturbs your sleep the most
"Our results identify vasopressin signalling as a possible therapeutic target for the management of circadian rhythm [body clock] misalignment."
Dr Michael Hastings, a Medical Research Council body clock researcher, told the BBC's Science in Action programme: "It's a remarkable study, it really is very exciting for our field.
"There's been many false dawns when it comes to a cure for jet lag, but I think this time they're close to the money."
However, he cautioned that vasopressin receptors were also heavily involved in kidney function so any drug developed would need to be designed carefully to target the body clock without disrupting the kidneys.
Dr Hastings added that with an increasingly 24-7 society a drug which can adjust the body clock could, in theory, improve the health of shift workers.
"The issue here in terms of public health is rotational shift work, the epidemiological evidence that we have now shows that if a worker has spent a working life doing rotational shift work they're at higher risk of contracting certain forms of cancer, cardiovascular disease or metabolic syndrome like diabetes."


Teenage cancer fundraiser Stephen Sutton has died peacefully in his sleep, his mother said on his Facebook page.

The 19-year-old, from Burntwood in Staffordshire, raised more than £3.2m ($5.36m) for charity after news of his plight spread on social media.
In a post announcing Stephen's death, Jane Sutton said he was a "courageous, selfless, inspirational son".
Stephen was diagnosed with terminal cancer aged 15.
Rather than dwell on his misfortune, the teenager drew up a "bucket list" of things he wanted to achieve before he died.
This led to him completing a skydive and playing drums in front of 90,000 people before the Uefa Champions League final at Wembley last May, among various achievements.
Ms Sutton said in her statement: "My heart is bursting with pride but breaking with pain for my courageous, selfless, inspirational son.
"The ongoing support and outpouring of love for Stephen will help greatly at this difficult time, in the same way as it helped Stephen throughout his journey.
"We all know he will never be forgotten, his spirit will live on, in all that he achieved and shared with so many."
The Facebook post announcing Stephen's death was shared more than 120,000 times within an hour of its publication.
Donations to his online fundraising page, set up in aid of the Teenage Cancer Trust, began to climb once again as the news of the teenager's death spread.
Justgiving, which hosts Stephen's online fundraising page, said its engineers had to "work quickly" to boost server capacity after a sharp increase in visitors to the site.
It said the campaign total had risen by about £60,000 in just over two hours.
Stephen was readmitted to hospital on Sunday after developing breathing difficulties caused by the regrowth of tumours.
He had initially set out to raise just £10,000 ($16,800) for charity, but his fundraising campaign attracted huge attention last month after he posted a selfie online.
The image went viral and attracted the support of celebrities including Jason Manford, who championed Stephen's charity efforts.
Paying tribute, the comedian said Stephen "was the most inspiring person I've ever met and touched more lives than he will ever know".
"He was an incredibly positive young man and a credit to his family, to Burntwood and to humanity itself.
"The reason we took to him so passionately was because he was better than us, he did something that none of us could even imagine doing.
"In his darkest hour he selflessly dedicated his final moments to raising millions of pounds for teenagers with cancer."
As well as for his fundraising, Stephen became well known for his bucket list.
Along with skydiving and playing drums to a huge crowd, the list also included hugging an elephant and getting a tattoo.
Stephen, who was diagnosed with metastatic bowel cancer aged 15, was visited earlier this month at Birmingham's Queen Elizabeth Hospital by Prime Minister David Cameron, who praised his "incredible" efforts to help others.
Mr Cameron said: "I can hardly think of anyone I've met with such a zest for life, and such a belief that you can get things done, and who wanted to live every minute.
"He was absolutely inspiring."
Labour leader Ed Miliband also paid tribute and wrote: "Tragic news that Stephen Sutton has passed away. His bravery & determination to live life to the full was an inspiration to us all."
Deputy Prime Minister Nick Clegg wrote: "Very sad to hear about the death of Stephen Sutton. Such a brave, selfless and inspirational young man."
A number of celebrities and public figures have also paid tribute to Stephen.
Comedian Ricky Gervais tweeted: "RIP Stephen Sutton. A true hero & inspiration to us all."
TV presenter Clare Balding tweeted: "Desperately sad to hear that Stephen Sutton has died. I feel privileged to have met him and heard him speak."
The Teenage Cancer Trust, to which Stephen made the largest ever single donation in its history, said: "We are humbled and hugely grateful for what Stephen achieved and continues to achieve for us."
Deborah Alsina, chief executive of Bowel Cancer UK, said Stephen had "undoubtedly created greater awareness... that bowel cancer can affect younger people too and for this we owe him such gratitude".
Staff at his former school, Chase Terrace Technology College in Burntwood, paid tribute to the "model student".
Chair of governors Di Evans said he "made such a difference to people's lives - not just in Burntwood, not just in Birmingham, or England but worldwide".
"He never ever stopped smiling despite that awful illness," she said.
"He never, ever gave up and was fighting to the very end."


Work and Pensions Secretary Iain Duncan Smith has told the BBC that the Universal Credit programme may not be complete by 2017 as planned.

Mr Duncan Smith told a committee of MPs in July and the Commons in September that the 2017 plan remained in place.
But he has now said some people receiving Employment Support Allowance may not be transferred in time.
The government estimates about 700,000 people in this group could be moved to Universal Credit after 2017.
In an interview with the BBC, Mr Duncan Smith said the Department for Work and Pensions (DWP) "may take a little longer" as it was dealing with a vulnerable group and the official in charge of the project, Howard Shiplee, may want to take more time.
Mr Duncan Smith insists despite the possible late transfer of claimants the new benefit system will "essentially" be complete by 2017.
Ministers will argue that these claimants are among those least able to work so least likely to lose out by not being part of Universal Credit.
But the opposition will ask why an apparently unqualified commitment to the 2017 timescale was given to MPs as recently as September.
A written statement from the Department of Work and Pensions said the "safe and smooth delivery" of the new system would "take precedence over meeting specific timings".
Mr Duncan Smith told the BBC: "We may take a little longer on those who are already in, say, ESA who have no work requirement on them because they are a very vulnerable group and therefore Howard Shiplee may say we want to take a little more time on them because they need to be processed carefully and dealt with carefully.
Iain Duncan Smith wants to send out the message that his Universal Credit plan is under control.
Having been savaged by the National Audit Office, he says the department is getting to grips with a new IT system.
He insists his plans to get Universal Credit set up by 2017 are "essentially" in place.
But news that 700,000 people could be transferred onto the Credit after 2017 will be seized on by his opponents, particularly after he told MPs in September that he would deliver "in time and in budget".
There will be more difficult questions when the DWP reveals just how much taxpayers' money has been written off along the way.
"But essentially Universal Credit as a benefit will be the benefit by 2016 and the remains of the vast, vast majority of the stock will be in place pretty much by the end of 2017."
The DWP's written statement said what it described as an "enhanced" IT system for Universal Credit had "proved viable" and would undergo further tests with a view to using it more widely.
The new system would be more efficient and would eventually become the "final vehicle" by which Universal Credit was delivered, said Mr Duncan Smith.
The department will continue to use the existing system while the new technology is developed.
The statement said "most" of the existing benefit claimants will be moved to Universal Credit during 2016 and 2017.
Mr Duncan Smith declined to say whether the Department still aimed to enrol 184,000 claimants onto Universal Credit by April 2014 - an aim set out in December last year - in the existing trial areas.
Asked about the policy he said: "I'm not setting targets for specific numbers at particular points, what I'm giving you is the overall plan is how we will achieve the completion of Universal Credit."
Recent figures showed only around 2,000 people were receiving the Universal Credit in pilot areas so far.
Addressing MPs in September, Mr Duncan Smith said: "The plan is, and has always been, to deliver this within the four-year schedule to 2017. At the time I came here, I believed that to be the case, I am standing here today telling this House - whether you like it or not not - I'm saying that that is exactly what the plan is today. We will deliver this in time and in budget."
He told the Work and Pensions select committee in July: "We are bound to the timescales set: between October 2013 and 2017, all of those who fall within the ambit of Universal Credit will be on Universal Credit."
The DWP will give further details when ministers appear before a committee of MPs on Monday. They may include the amount of money "written off" as the IT system has changed. Mr Duncan Smith said he did not recognise figures quoted in the press.
Earlier this year the National Audit Office said Universal Credit had been badly managed, was "overambitious" and provided poor value for money.
It said risks were taken to hit targets, IT systems had "limited functionality" and an unfamiliar project management approach was used.
Under the Universal Credit plans, six key means-tested benefits - jobseeker's allowance, employment support allowance, housing benefit, working tax credit, income support and child tax credit - are to be combined into a single payment which ministers say will ensure that claimants are always better off in work and also reduce fraud.
Mr Duncan Smith also denied claims - made by Labour sources - that he had sought to shift blame for problems with the Universal Credit to the DWP permanent secretary Robert Devereux.
Labour's Rachel Reeves, shadow work and pensions secretary, said: "On the morning of the Autumn Statement this is yet another shambolic announcement from this out-of-touch Government.
"Iain Duncan Smith has today admitted what everyone has known for months - that Universal Credit is massively behind schedule. But just a couple of weeks ago he was telling Parliament the Government would 'roll out Universal Credit on the plan and programme already set out'."


Warrington Wolves came from behind to beat St Helens and secure their place in Super League's Grand Final.

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If Warrington defeat either Wigan Warriors or Hull FC on 8 October, they will be domestic champions for the first time since 1955.
Stefan Ratchford and Tom Lineham touched down in the second period to send the Wolves to Old Trafford.
Saints had led 10-8 at half-time, with Kurt Gidley's try for the home side cancelled out by Jonny Lomax.
But the visitors were unable to add any further points after the interval and they could feel aggrieved about the award of Lineham's match-clinching try.
Television replays appeared to show that the former Hull winger had knocked on in attempting to ground the ball in the corner.
In reaching the Grand Final, Warrington ended a run of seven successive home defeats by St Helens, a sequence that had stretched back to June 2011.
Wigan host Hull in the second semi-final on Friday.
Both sides had taken a fairly pragmatic approach in the first period, turning down attempts to run sets of six at the opposition and instead electing to take the two points on offer from kicks at goal.
The one real moment of quality before the break came from St Helens, who scored a scintillating breakaway try through Lomax after good work by Jordan Turner and Adam Swift.
Warrington required a spark having conceded a two-point deficit at half-time, and full-back Ratchford provided two excellent creative moments to swing the match in his side's favour.
Ratchford, who appeared in Warrington's two Grand Final defeats in 2012 and 2013, first spotted a gap in the Saints defence to dive over from dummy-half and then fired a pass out wide for Lineham to cross for his third try in two matches.
And, as St Helens attempted to find a way back into the semi-final, Ratchford was rock solid under the high ball and helped to see off any late threats that Saints posed.
Warrington head coach Tony Smith: "I thought both teams defended really well, we didn't give each other too many opportunities. I thought Saints were fantastic.
"But I just had that feeling that, no matter what happened, they were going to work hard for each other and that's a really big ingredient in rugby league.
"You might not be squeaky clean or just perfect in some areas, but if you work really hard for each other you can cover over a lot of the cracks."
Warrington captain Chris Hill: "[Winning the Grand Final] would be unbelievable and it would go down in history. For me personally being captain, it would be something special and something I'd never forget, but we'll get to that when we're walking up those steps.
"Before that, we've got a big week ahead of us and we're going to prepare well."
St Helens head coach Keiron Cunningham: "I just thought we lacked a little bit of composure in certain areas. That's generally how you win big games - the most composed side for longer periods and whoever kicks the ball best.
"Warrington didn't do anything special, they just did what they always do. I thought we defended a lot of their stuff really well.
"But the biggest thing for me, which is becoming a bit of a blight on the game, is you're looking at the first semi-final and what everybody's talking about is the video referee and refereeing decisions. We just couldn't buy a call tonight.
"You need your fair share of those calls, you do need a bit of luck in the game and it does even itself out over the period of a season, but it seemed like it went a fair bit against us in the wrong game."
Warrington: Ratchford; Lineham, Evans, Atkins, Russell; Gidley, Patton; Hill, Clark, Sims, Wilde, Hughes, Westerman.
Interchanges: T King, G King, Smith, Philbin.
St Helens: Lomax; Owens, Peyroux, Percival, Swift; Turner, Walsh; Amor, Roby, Richards, Greenwood, McCarthy-Scarsbrook, Wilkin.
Interchanges: Walmsley, Vea, Thompson, Knowles.
Referee: Ben Thaler.


West Ham striker Enner Valencia is "a couple of weeks" away from returning to full fitness, says Hammers boss Slaven Bilic.

The Ecuadorian damaged his right fibula in a Europa League qualifying tie in July.
Valencia, 25, scored four goals in 32 Premier League games last season.
Midfielder Alex Song, 28, who is yet to make an appearance this season because of an ankle injury, is "a maximum of three weeks away", according to Bilic.
Valencia apologised to the club and its medical staff in August after claiming he had been "forgotten" by the Hammers in a radio interview after his injury.
Striker Andy Carroll, 26, and defender Angelo Ogbonna, 27, are available for Saturday's trip to Crystal Palace (15:00 BST) after recovering from injuries.
Left-back Aaron Cresswell, 25, and defender Winston Reid, 27, have minor knocks and are rated at 50/50 for Saturday.


Manchester United remain keen to sign Cesc Fabregas despite Barcelona claiming United have given up their pursuit of the Spain midfielder.

The Premier League champions have already had two offers for the 26-year-old former Arsenal captain turned down.
Fabregas will stay one more year at least in Barcelona
Barcelona sporting director Andoni Zubizarreta told a Spanish newspaper United have "renounced his signing".
But sources close to the English champions have indicated they are considering a third bid for Fabregas.
Any bid over £30.75m would exceed United's transfer record and the player remains the main target of new manager David Moyes with four weeks remaining until the summer transfer window closes.
Zubizarreta, speaking in Israel where the Catalan giants are currently on tour, told Spanish newspaper Sport the player is going nowhere.
"Manchester United are interested in the player, but it's also true that they understand our position of not wanting to sell," said the ex-Spain goalkeeper.
"They have renounced his signing. We aren't going to sell him."
Zubizarreta added on Barcelona's official website: "He has a contract with us. We count on Cesc.
"He's an extraordinary player who creates and finishes chances. We are delighted with him. He's the number four of Barca."
Fabregas moved to the Nou Camp from Arsenal in 2011 in a £35m deal and has since helped his boyhood club to a La Liga title, a  Copa Del Rey victory, the Uefa Super Cup and the Fifa Club World Cup.
Barcelona manager Gerardo Martino claims it would be up to the Spain international where he played next season and Arsenal are understood to have first option on Fabregas.
However, Gunners manager Arsene Wenger believes the player will remain in Spain.
"What I know is Fabregas will stay one more year at least in Barcelona," said the Frenchman. "That's the information I have. If that changes, I don't know, but that is what I have been told."


A first edition set of The Lord of the Rings trilogy has been sold at auction in Gloucestershire for £24,000.

All three title pages of the books had been signed by the author, JRR Tolkien. They had attracted huge interest at the auction in South Cerney.
The auction also included one of the earliest copies of The Hobbit, which was sold for £3,200.
The set of books was estimated to sell for between £10,000 and £15,000.
Chris Albury, from Dominic Winter Auctioneers, said the books were from Rayner Unwin of the publishing firm, Allen and Unwin.
He said: "Tolkien fans may not immediately recognise the name, but if they look at the spines of their books they'll find they are the publishers of the books, from The Hobbit onwards.
"Rayner Unwin was as a 10-year old, given the manuscript of The Hobbit by his father, Sir Stanley Unwin, saying 'what do you reckon to this?'
"He read it and gave a reader's report and said it was very good and should appeal to seven to nine-year-olds. He [Sir Stanley] published it, and the rest is history."


Mats Hummels scored his first Bundesliga goal for Bayern Munich as they beat Bayer Leverkusen to move to within three points of shock German league leaders RB Leipzig.

Thiago headed the champions ahead after Bernd Leno parried Philipp Lahm's shot.
Hakan Calhanoglu scored a brilliant leveller for the visitors, smashing the ball over Manuel Neuer at his near post after a one-two with Julian Brandt.
But Hummels headed in Joshua Kimmich's corner to win it for the hosts.
Bayern, who are chasing a fifth consecutive league title, had lost their previous two games in all competitions, and failed to win in three, in a relatively slow start under manager Carlo Ancelotti.
Elsewhere, Borussia Dortmund dropped down to sixth after a 2-1 defeat at Eintracht Frankfurt, with Haris Seferovic scoring the winner moments after Pierre-Emerick Aubameyang's equaliser.
Fifth-placed Hoffenheim drew 1-1 at Borussia Monchengladbach to remain unbeaten - although they have only won five of their 12 games.
Former Arsenal midfielder Serge Gnabry continued his good season with the equaliser as Werder Bremen drew 2-2 at relegation rivals Hamburg.
Match ends, FC Bayern München 2, Bayer 04 Leverkusen 1.
Second Half ends, FC Bayern München 2, Bayer 04 Leverkusen 1.
Attempt saved. Hakan Calhanoglu (Bayer 04 Leverkusen) right footed shot from outside the box is saved in the top left corner.
Foul by Franck Ribéry (FC Bayern München).
Kevin Volland (Bayer 04 Leverkusen) wins a free kick in the attacking half.
Attempt blocked. Aleksandar Dragovic (Bayer 04 Leverkusen) with an attempt from the centre of the box is blocked.
Attempt blocked. Hakan Calhanoglu (Bayer 04 Leverkusen) right footed shot from outside the box is blocked. Assisted by Wendell.
Xabi Alonso (FC Bayern München) wins a free kick in the defensive half.
Foul by Kai Havertz (Bayer 04 Leverkusen).
Attempt missed. Arturo Vidal (FC Bayern München) right footed shot from the centre of the box is high and wide to the right. Assisted by David Alaba.
Attempt missed. Kevin Kampl (Bayer 04 Leverkusen) right footed shot from outside the box is close, but misses to the right. Assisted by Kai Havertz.
Offside, Bayer 04 Leverkusen. Charles Aránguiz tries a through ball, but Chicharito is caught offside.
Attempt missed. Kevin Volland (Bayer 04 Leverkusen) header from the right side of the six yard box is close, but misses to the right. Assisted by Jonathan Tah.
Substitution, FC Bayern München. Arturo Vidal replaces Philipp Lahm.
Javi Martínez (FC Bayern München) wins a free kick in the defensive half.
Foul by Chicharito (Bayer 04 Leverkusen).
Attempt missed. Thiago Alcántara (FC Bayern München) right footed shot from outside the box is high and wide to the right.
Attempt saved. Kai Havertz (Bayer 04 Leverkusen) left footed shot from outside the box is saved in the top centre of the goal. Assisted by Chicharito.
Foul by Xabi Alonso (FC Bayern München).
Chicharito (Bayer 04 Leverkusen) wins a free kick on the right wing.
Xabi Alonso (FC Bayern München) wins a free kick in the attacking half.
Foul by Chicharito (Bayer 04 Leverkusen).
Foul by Franck Ribéry (FC Bayern München).
Jonathan Tah (Bayer 04 Leverkusen) wins a free kick in the defensive half.
Substitution, FC Bayern München. Franck Ribéry replaces Douglas Costa.
Attempt saved. Douglas Costa (FC Bayern München) left footed shot from outside the box is saved in the bottom left corner. Assisted by Thiago Alcántara.
Corner,  FC Bayern München. Conceded by Aleksandar Dragovic.
Corner,  FC Bayern München. Conceded by Bernd Leno.
Offside, FC Bayern München. Mats Hummels tries a through ball, but Robert Lewandowski is caught offside.
Substitution, FC Bayern München. Arjen Robben replaces Thomas Müller.
Javi Martínez (FC Bayern München) wins a free kick in the defensive half.
Foul by Kevin Volland (Bayer 04 Leverkusen).
Corner,  Bayer 04 Leverkusen. Conceded by Xabi Alonso.
Foul by Douglas Costa (FC Bayern München).
Chicharito (Bayer 04 Leverkusen) wins a free kick on the right wing.
Attempt blocked. Benjamin Henrichs (Bayer 04 Leverkusen) right footed shot from outside the box is blocked.
Corner,  Bayer 04 Leverkusen. Conceded by Robert Lewandowski.
Corner,  Bayer 04 Leverkusen. Conceded by Xabi Alonso.
Attempt blocked. Hakan Calhanoglu (Bayer 04 Leverkusen) right footed shot from outside the box is blocked. Assisted by Kevin Volland.
Attempt saved. Douglas Costa (FC Bayern München) left footed shot from the left side of the box is saved in the centre of the goal. Assisted by Philipp Lahm.


Jordan has confirmed the death of pilot Moaz al-Kasasbeh after a video published online by Islamic State (IS) claimed to show him being burned alive.

The video shows a man standing in a cage engulfed in flames. Officials are working to confirm its authenticity.
Jordan's King Abdullah hailed Lt Kasasbeh as a hero, saying Jordan must "stand united" in the face of hardship.
The pilot was captured when his plane came down near Raqqa, Syria, during a mission against IS in December.
The video posted on Tuesday was distributed via a Twitter account known as a source for IS propaganda.
The highly produced 22-minute film includes a sequence showing the Jordanian pilot walking at gunpoint amongst rubble apparently caused by coalition air strikes that targeted jihadists.
BBC security correspondent Frank Gardner says that in a world already shocked by the calculated cruelty of Islamic State's actions, the horrific video is aimed primarily at Arab populations in Jordan and the Gulf states.
Jordanian state TV reports that Lt Kasasbeh, 26, was killed a month ago. Jordan had tried to secure his release since then.
The country has vowed "punishment and revenge" for his death, and the king described IS as a "deviant criminal group".
Jordan, which has joined the US-led coalition against IS, had been attempting to secure Lt Kasasbeh's release as part of a prisoner swap, offering to free Iraqi militant Sajida al-Rishawi in exchange.
She is a failed suicide bomber now on death row in Jordan for her role in attacks in the capital, Amman, that killed 60 people in 2005.
IS had sought Rishawi's release as part of a deal to free captive Japanese journalist Kenji Goto. A video that appeared to show Goto's dead body appeared three days ago.
Jordanians greeted the news with horror. Many have seen the gruesome video, barely edited, played over and over on television.
Hundreds gathered in the streets after dark, demanding revenge against Lt Kasasbeh's killers. Some also wanted to know why Jordan was involved in this fight at all.
The pilot's father was among supporters when the news came through. He and other family members have left the capital to mourn at home.
King Abdullah said Lt Kasasbeh had died defending his beliefs and homeland. The defence ministry said the pilot's blood would not have been shed in vain. It is promising a fitting punishment.
For many Jordanians, this has to begin with the quick execution of Sajida al-Rishawi, the failed al-Qaeda suicide bomber, jailed 10 years ago for her part in a spate of bombings against hotels here.
Profile: Lt Moaz al-Kasasbeh
A spokesman for the Jordanian armed forces, Mamdouh al-Ameri, said Lt Kasasbeh had "fallen as a martyr".
"His blood will not be shed in vain," he said. "Our punishment and revenge will be as huge as the loss of the Jordanians."
Jordanian officials were quoted as saying Rishawi would be executed imminently, along with three other convicted militants.
One thing is clear from this video - Islamic State never had any intention of releasing the young Jordanian pilot. According to Jordanian state media he was killed on 3 January, well before the supposed prisoner exchange talks moved into high gear.
The cynical manipulation of this episode by IS shows the importance it affords to information warfare - here an attempt to create problems for the Jordanian authorities and to weaken the Arab-Western coalition, at a time when it appears to be struggling to make dramatic headway against IS on the ground.
This is the problem for the coalition. Its air campaign is in many ways a stop-gap intended to halt the progress of IS, but requiring effective troops on the ground to significantly turn back its advance.
Jordan's King Abdullah is cutting short a visit to the US after news of Lt Kasasbeh's death, but he met President Barack Obama on Tuesday evening before flying home.
Mr Obama earlier said in a statement that if the video was real, it would be "one more indication of the viciousness and barbarity" of IS.
"I think it will redouble the vigilance and determination on the part of the global coalition to make sure they are degraded and ultimately defeated," he added.
The Jordanian king has already met US Vice-President Joe Biden who "reinforced America's ironclad support" for Jordan, the White House said.
24 December 2014: Jordanian Lt Moaz Youssef al-Kasasbeh captured by IS after his plane crashes
25 December 2014: Pilot's father urges IS to show mercy
20 January 2015: IS threatens to kill two Japanese hostages unless Japan pays $200m ransom within 72 hours
24 January: IS releases video of Japanese hostage Kenji Goto holding a picture apparently showing Haruna Yukawa's decapitated body
24 January: IS calls for release of Sajida al-Rishawi, an Iraqi militant sentenced to death in Jordan
28 January: Jordan offers to release Rishawi in exchange for Lt Kasasbeh
29 January: Deadline to kill Lt Kasasbeh and Mr Goto expires
31 January: Video released appearing to show Kenji Goto's body
3 February: Video released appearing to show Lt Kasasbeh burnt alive, with Jordanian media suggesting he was killed weeks earlier


Thousands of people are expected in Swansea for this year's Wales National Airshow.

The two-day event, which started on Saturday, features aircraft including the MiG-15 UTI in honour of Russian-Soviet pilot and cosmonaut Yuri Gagarin.
In 1961, Mr Gagarin became the first person to journey into outer space.
Other displays include the Breitling Wingwalkers, the Tigers parachute team and the Red Arrows.
Robert Francis-Davies, of Swansea council, said: "It's great news for Swansea people and Swansea businesses, helping pump millions of pounds into the local economy over the course of a single weekend."


Resolving a teaching assistant pay dispute could threaten hundreds of jobs, a council has claimed.

Teaching assistants are staging a 48-hour strike over Durham County Council's proposal to only pay them during term time.
But Councillor Jane Brown, Labour cabinet member, said resolving the dispute would cost millions of pounds and "hundreds of jobs".
Unison said cutting low-paid workers salaries was "heartless and appalling".
About 100 schools had to close or cut lessons during a two-day stoppage earlier this month.
The latest action will affect 87 schools - 70% will be partially closed and 19 will shut for both days, the county council said.
Ms Brown said the council could not afford to raise the wages of other employees in line with those of teaching assistants and it was facing equal pay claims.
"It was brought to our attention that the teaching assistants were on a contract that was very different from the rest of our workforce.
"They also get paid for more hours than they actually work and almost six weeks extra holiday fully paid a year than the rest of our employees - we really had to address this situation", she said.
Union bosses said the council's proposals would mean a 20% drop in support staff salaries.
Unison northern regional secretary Clare Williams said: "It's very simple, there can be no justification to say you are tackling an equal pay issue by slashing pay by up to 23%.
"Teaching assistants are dedicated to their jobs and the children they teach.
"They don't want to be taking strike action, but the council has left them with no option."


Striker Roberto Soldado has moved from Tottenham to Spanish side Villarreal in a deal worth a reported £7m.

Soldado, 30, cost Spurs a club record £26m when he signed from Valencia in August 2013 but he only managed seven goals in 52 Premier League appearances.
"This is a very important step in my career," said Soldado, who has agreed a three-year contract with Villarreal.
"When their offer arrived I didn't hesitate as it's a great opportunity to return to Spain and join a big club."
Soldado began his career at Real Madrid, scoring 63 goals in 120 league appearances for their B side, before moves to Getafe, Valencia and then Tottenham.
He has won 12 international caps for Spain and believes this move can help him regain his best form.
"I've been away for two years in which I haven't been able to give my best, but I'm convinced that I can score lots of goals for Villarreal," added Soldado.
"I've spent two very difficult years in England where I lost my confidence. Villarreal's interest has given me the enthusiasm to do great things.
"I want to return to play at a good level and score lots of goals. I want to go back to being the player I used to be."
Villarreal finished sixth in La Liga last season and will compete in the Europa League this season along with Tottenham.


Shadow home secretary Diane Abbott said 20,000 police officers in England and Wales had been lost from the force since 2010.

The claim: Police numbers have fallen by 20,000 since 2010.
Reality Check verdict: Labour's figures are about right.  Latest statistics show that police officer numbers in England and Wales have fallen by 19,000 since 2010.
Between September 2010 and September 2016, police numbers in England and Wales fell by 18,991, or 13%, according to the Home Office.
Police numbers rose gradually from the 1980s, with a sharp rise from around 2000. Since around 2010, however, they have been falling significantly.
The figures Ms Abbott points to are for England and Wales only, because policing in Scotland and Northern Ireland is devolved.
In Scotland, police numbers have risen more or less continuously since 1985, while in Northern Ireland there has been a decrease since 2010, but not as sharp as the decrease seen in England and Wales.
As of September 2016, there were 122,859 police officers working in England and Wales.
Up until 2010, spending on policing had been increasing for at least 15 years, rising most sharply between 2000 and 2010 when it went up by around 30%. But since then, spending has come back down significantly.
Although the Conservatives pledged to protect police budgets in real terms in 2015, this came off the back of five years of deep cuts amounting to 18% in real terms.
Numbers of Special Constables and Police Community Support Officers (PCSOs) who patrol the streets, have also fallen by 7% and 11% respectively in the last year alone.
No comprehensive research has been done into whether there is a link between falling police numbers and rising crime levels.
However, Her Majesty's Inspectorate of Constabulary (HMIC), the body which inspects police forces, has warned that cutbacks could put the public at risk.
Crime statistics are a tricky area in the first place, with numbers of crimes recorded by the police going up 9% in the last year, while levels of crime experienced by households when asked as part of a survey remained stable.
Police recorded crimes are not designated as national statistics because they are not considered reliable enough.
On this measure, crime fell between 2010 and 2014 and since then has been increasing, but a lot of this is down to changes in recording practices.
Knife crime in London has been rising for four years in a row and in 2016 the police recorded a 14% increase in offences involving a knife or sharp instrument compared with the previous year, across England and Wales. This is thought to be down to both a real increase in actual offences and to changes in recording practices.
Crimes, excluding fraud and cyber crimes, that were reported by households in a large scale survey - the Crime Survey for England and Wales - have fallen overall in this period.
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A landowner who felled hundreds of protected trees in the South Downs without permission is selling the site.

Estate agent Connells Group confirmed Pondtail Wood near Hurstpierpoint will be sold at auction on 12 September.
Protesters were appalled at the destruction of ancient woods by landowner Wineham Properties Ltd earlier this year.
The Forestry Commission ordered the trees be replanted by 30 April 2017 and looked after for 10 years.
The South Downs National Park Authority (SDNPA) also investigated and issued Stop and Enforcement Notices in June.
But solicitors for Wineham Properties Ltd lodged an appeal in July which suspended the notice until the appeal was decided or withdrawn, the SDNPA said.
A spokesperson for the SDNPA said: "We are aware that a for sale sign went up last week. The landowner is legally entitled to sell the property.
"The notices stay with the land and so will transfer to any new owner. The owner should declare the notices prior to any sale."
The BBC has attempted to contact Wineham Properties for comment.