Andy Murray has pulled out of the US Open two days before the start of the tournament in New York after failing to recover from a hip injury.
The British world number two, 30, has not played since Wimbledon, when he was hampered by the injury as he lost to Sam Querrey in the quarter-finals.
Murray practised all week but said on Saturday the injury remained an issue.
"It's too sore for me to win the tournament and ultimately that's what I was here to try and do," said the Scot.
The 2012 US Open champion was due to face American world number 104 Tennys Sandgren in the first round.