American Sam Querrey left Russia two days after testing positive for coronavirus at the St Petersburg Open, say tournament organisers.
The world number 49 was removed from the event on Monday after he, his wife and baby son contracted the virus.
Querrey, 33, left the country on a private jet instead of quarantining.
"As Querrey told an ATP representative, he and his family left Russia on a private plane," a statement on the tournament website said.
Querrey and his wife passed their initial coronavirus test upon arrival at the tournament on 7 October, but tested positive four days later.