Stefanos Tsitsipas gets booed at US Open after lengthy bathroom break 

After Andy Murray spoke at length about his belief that Stefanos Tsitsipas' tactics influenced their first-round match at the US Open, the Greek was once again under the microscope. But this time, it was the crowd who spoke up on Wednesday evening.

Having opened a two-set lead against Adrian Mannarino, Tsitsipas lost a third-set tiebreaker and opted to leave the court before beginning the fourth set. The New York fans, clearly up to speed on the sport's hottest topic, booed the No. 3 seed when he returned. Nearly eight minutes had elapsed since Mannarino grabbed the momentum.

Tsitsipas previously told press after his Cincinnati semifinal defeat to Alexander Zverev that he doesn't plan on changing his habits in response to heavy criticism. This was amplified when Zverev's complaints were picked up by an on-court microphone at the Western & Southern Open.

"People have to understand. I'm not going to stop doing it, because it makes me feel better when I step out on the court to begin the new set," Tsitsipas said then.

Mannarino's reaction was not as strong as the Greek's last two opponents, but he does believe it's an issue.

"He is not doing anything wrong, I think the rules are wrong," Mannarino said following the match.

When asked during his on-court interview on what helped him prevail, Tsitsipas was direct as can be.

“I went to go get changed. It definitely helped," he said.

Tsitsipas claimed his 50th win of the season (the first to do so in 2021) to set up third-round meeting with 18-year-old Carlos Alcaraz.