US Open men's final delayed by Trump's arrival

The men's US Open final has been delayed by extra security measures as Donald Trump's arrival was met by cheers and boos from fans at Flushing Meadows.

The match between Jannik Sinner and Carlos Alcaraz, the world's top two players, was pushed back by half an hour in New York on Sunday before Alcaraz won three sets to one. The US president was greeted with a mix of cheers and boos from early arriving spectators when he waved from a suite at the Arthur Ashe Stadium about 45 minutes before the match began.

Increased security checks at entrances to the grounds and to get into the arena building prompted the US Tennis Association to move the start time to 2.30pm, local time, instead of 2pm. Organisers said it was "to ensure that fans have additional time to get to their seats." A spokesperson for the US Tennis Association said it "was not a request made by the White House".

Despite the change, the 24,000-capacity arena was only about two-thirds full when the first point was played, while thousands of fans still were standing outside the court, waiting in line to enter. Mr Trump, who is the first sitting president to attend the tournament at Flushing Meadows since Bill Clinton in 2000, was booed again when he appeared for the National Anthem.

Standing up and saluting, the president was shown briefly on the arena's big screens during the anthem, and offered a smirk that briefly made the boos louder. Read more on Sky News: 'Chipocalypse Now': Trump threatens US cityTrump orders 'take down' of 44-year-old peace vigilThe proxy war that will redefine public health in America Always a big celebrity draw, the final attracted, among others, Manchester City manager Pep Guardiola, former Vogue editor Anna Wintour, Hollywood stars Ben Stiller and Danny DeVito, director Spike Lee and basketball player Steph Curry..