Britain's Jack Draper threw up on court during a dramatic US Open semi-final defeat where world number one Jannik Sinner ultimately proved a step up in class.

The 22-year-old British number one's breakout run at a Grand Slam tournament was ended in a 7-5 7-6 (7-3) 6-2 defeat in New York.

In the biggest match of his fledgling career, 25th seed Draper caused problems for Sinner in a tight first set.

But, as the contest became more physical in the second set, a peaky-looking Draper vomited and was unable to inflict enough damage on Sinner's serve.

Sinner, 23, will go on to face either 12th seed Taylor Fritz or 20th seed Frances Tiafoe, who meet in an all-American semi-final later on Friday.

More to follow.