Andy Murray has been added to the US Open main draw after Swiss former champion Stan Wawrinka withdrew.
Murray, who won his first Grand Slam title at the tournament in 2012, pulled out of the men's singles event at the Tokyo Olympics with a thigh strain.
The 34-year-old Briton continued to play in the doubles and lost in the quarter-finals alongside Joe Salisbury.
Murray made it to the Wimbledon third round in July, losing to Canada's Denis Shapovalov in straight sets.
It was the first Grand Slam Murray had played in 2021, after missing the Australian Open because of a positive coronavirus test and deciding not to compete in June's French Open.