Kristina Mladenovic revealed she has had to enter a "bubble bubble" at the US Open after coming into contact with Benoit Paire, who tested positive for coronavirus.
Paire was removed from the men's singles draw after the United States Tennis Association (USTA) on Sunday confirmed an unnamed player had returned a positive COVID-19 test.
As the grand slam got under way behind closed doors at Flushing Meadows on Monday, it was reported a number of French players had to abide by strict quarantine rules because they were in contact with compatriot Paire.
Mladenovic confirmed she must adhere to tighter regulations in New York after she beat Hailey Baptiste 7-5 6-2 on day one of the tournament.
Asked if she had been in contact with Paire, she said: "I did a one-hour training session with Benoît a few days ago, but we were on either side of the net, and that is not taken into account.
"On the other hand, I also spent between half an hour and three quarters of an hour, in the hotel lobby, playing cards with different people. Benoit was there.
"It was the fact of having passed that moment, even though we were all masked, that led to the continuation. It was hard for me to accept the situation because I am not part of his close entourage. And I'm sorry and sad for Benoit."
Quizzed how her situation has changed, Mladenovic replied: "I have the right to play my match, but I literally have the right to do nothing else.
"I am not allowed to go to the gym, not to do anything that is public inside the bubble. I can only be completely alone with my brother, who coaches me. It's really a bubble within the bubble."
Mladenovic revealed she had returned two negative COVID-19 tests since it was revealed Paire had tested positive.