Andy Murray is to take a break from tennis for the rest of the year to recover from a nagging hip injury.
The world number two pulled out of the US Open two days before the tournament began and has not played since Wimbledon in July.
He has withdrawn from October’s ATP Tour events in Beijing and Shanghai and will likely miss the events in Vienna and Paris later that month.
“This is the best decision for my long-term future,” said the Scot.
He is likely to aim for a return to action at the Brisbane International on 1 January, in preparation for the Australian Open, which begins on 15 January.
“I’m confident after this extended period of rest and rehabilitation I will be able to reach my best level again and be competing for Grand Slam titles next season,” he said.
Argentina’s Juan Martin del Potro knocked out Wimbledon champion Roger Federer in four sets to reach the US Open semi-finals.
The 24th seed won 7-5 3-6 7-6 (10-8) 6-4 and will face top seed Rafael Nadal, who earlier beat Russian teenager Andrey Rublev. Nadal remains world number one.
Earlier, Jamie Murray relinquished his US Open men’s doubles crown in disappointing fashion.
Alongside Brazilian Bruno Soares, the holders had no answer to opponents Jean-Julien Rojer and Horia Tecau, winning just three games as they exited the tournament 1-6 2-6 at the quarter-final stage after just over an hour on court.
Murray didn’t let the setback affect him too much, however, as he returned to action later in the day at Flushing Meadows to partner Martina Hingis to victory in the mixed doubles quarter-final.
Murray and Soares swiftly found themselves 5-0 down to Dutchman Rojer and Romania’s Tecau on Grandstand.
They at least prevented a love set and made a better start to the second but Soares’ serve was broken in the fifth game and that spelled the beginning of the end.
Murray, who has been struggling with knee pain, and Soares failed to make much of an impression on their opponents’ serve, creating only two break points and failing to take either.
The defeat ends a disappointing season in the slams for Murray and Soares, who won the Australian Open and US Open titles last year but have failed to make it past the quarter-finals in any of the four tournaments in 2017.
In the mixed tournament, Murray and Hingis edged out Abigail Spears and Juan Sebastian Cabal 6-3 2-6 10-8 in a thrilling contest at the Louis Armstrong Stadium
They will face Tecau and women’s singles quarter-finalist Coco Vandeweghe of the US in the last four.