Nick Kyrgios had a really heated clash with Stefanos Tsitsipas at Wimbledon and he continued raging about it even a day later.
That was revealed by Patrick Mouratoglou who watched the match from the box of Tsitsipas as he serves as a part-time coach and mentor for the Greek player. Tsitsipas had a few questionable choices in that one and Kyrgios was flabbergasted when he was not defaulted for dangerously hitting a ball into the stands. He raged all match about it and even the day after in the locker room.
"When he played against Stefanos and he thought that Stefanos should have been defaulted because he hit the ball into the crowd, he spoke about it almost the whole match, and he probably played the best he's ever played. The next morning I was in the locker room and Nick was still talking about it with another chair umpire or whatever shouting and still into it. He needs it. It brings the fire in himself that he needs to play his best."
Mouratoglou then talked about the final against Djokovic:
"I don't think that was a problem in that match [against Djokovic]. The problem in that match that Nick had to go through was the loss of concentration, the loss of focus. He got broken two times at 40-15 and 40-0. Because he was leading in the game and serving great, he just lost focus. Then deuce and then again he was in danger."
And more:
"So it's more this element, that he's struggling to keep the focus every point that is a problem, than the fact he gets angry at people, which actually brings his focus back a lot. He has a lot in common with John McEnroe in this. When he's 40-0 up there's zero fire in him, he's calm. That's where he loses the points. When he gets broken, then he gets angry and then he's playing good."