STEFANOS TSITSIPAS was booed by the U.S. Open crowd after taking another lengthy bathroom break, while a night match had to be suspended due to rain — despite it being played under a roof.

Greek third seed Tsitsipas had angered Andy Murray with his long trips to the bathroom in their marathon five-setter Monday.

He looked to be cruising into round three when he took a two-set lead against Frenchman Adrian Mannarino.

But after dropping the third set, he left the court for more than seven minutes.

The late-night crowd on Arthur Ashe made their feelings clear when he finally returned, but the fired-up world No. 3 went on to complete a 6-3, 6-4, 6-7 (4-7), 6-0 victory.

Afterwards, Tsitsipas insisted: “I haven’t done anything wrong, so I don’t understand. The people love the sport, they come to watch tennis. I have nothing against them. I love the fans.

“But some people don’t understand. They haven’t played tennis at high level to understand how much effort and how much difficult it is to do what we are doing.

“Sometimes we need a short break to do what we have to do.”

On the women’s side, teenager Coco Gauff was beaten in the all-American clash against Sloane Stephens.

Stephens, the 2017 champion who has slipped to 66 in the rankings, ran out a comprehensive 6-4, 6-2 winner against the 21st seed.(SD-Agencies)