British number one Jack Draper has withdrawn from the US Open because of an arm injury.
The fifth seed was seen as one of the contenders for the title at Flushing Meadows, having reached the semi-finals last year, but his preparations were disrupted by the injury.
The 23-year-old came through his first-round match against Argentine qualifier Federico Agustin Gomez in four tricky sets on Tuesday.
He was due to play Belgium's Zizou Bergs on Thursday.
"I tried my very best to be here and give myself the every chance to play but the discomfort in my arm has become too much," Draper wrote in a statement on X.
"I have to do what is right and look after myself."