World number one Novak Djokovic has confirmed he will play at the US Open, which starts on 31 August, in New York.
Defending champion Rafael Nadal has already decided not to enter because of concerns about Covid-19, while five-time winner Roger Federer is recovering from knee surgery.
In June, Djokovic called the US Open's coronavirus safety protocols "extreme".
"It was not an easy decision to make, but the prospect of competing again makes me really excited," he said.
Djokovic, who is president of the ATP Player Council, had previously questioned the protocols in place for the tournament to go ahead and spoke to organisers about his concerns.