After the first set concluded Zverev was unhappy with the prolonged bathroom break of Stefanos Tsitsipas that lasted almost 10 minutes. He complained to the ref who was receptive to the complaint and in turn, did not allow the Greek to do the same later in the match.
After his match ended Tsitsipas was asked about that and he said:
“Nothing crazy. It’s not astrophysics. “I’m heading towards the locker room to go change my T-shirt. I don’t think it would be very nice if I change my shorts on the court in front of everybody. I’m a person that sweats a bit more than others. I think it’s acceptable, it’s just how it works for me.”
It's a solid explanation by Tsitsipas who is usually drenched in sweat in most of his matches. However, he also has numerous coaching violations in his career raises suspicion in many things might be different. He also reiterated his intention of keep doing it as well as informing himself of the rules to better understand them.
“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. I somehow managed it (to play while sweat-soaked) but it wasn’t nice of him. I will check the rulebook later. A player shall be allowed to go to the bathroom in every single set, as far as I know.”
He further said:
"We are trying to play tennis out there, obviously sweating a lot, giving our best effort and our effort is not really being appreciated. I’m very sad to see it be this way.”