Andy Murray was furious at Tsitsipa's foul play with delays, including a long toilet visit, in the first round of US Open tennis.
Also in the second, the Greek took a little over seven minutes long toilet break - and was excommunicated.
However, the tactic went home.
Tsitsipas won 3-1 in sets over Adrian Mannarino, France.
Mannarino: "The rule is wrong"
It was timely enough after the Frenchman won the third set that Tsitsipas took his break.
Of course, he did not admit that it was to disturb Mannarino's flow in the match, but said afterwards that he was sweaty and needed to change clothes.
- I have not done anything wrong, so I do not understand, he says about the audience's booing when he came back after the break.
Tsitsipas was not disturbed by the buoy but won the fourth set 6-0.
Mannarino thinks that the rulers of tennis should review the rules that allow long breaks.
- The rule is wrong because it is not fair to disrupt the flow of the match, says Mannarino.