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 top two players in the world, was pushed back by half an hour in New York on Sunday.

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.

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."

Mr Trump is the first sitting president to attend the tournament at Flushing Meado

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