Nick Kyrgios is perhaps the biggest water divider of the entire ATP tour.
The Australian evokes emotions with his hot temper and his playful style of play - where he has made the forearm serve his parade number.
But the 27-year-old also has a habit of breaking the rules from time to time.
During Wimbledon, he has already been fined twice.
One time after spitting on a supporter and the other time for bad behavior on the court.
After Kyrgios defeated the American Brandon Nakashima in a five-seater and advanced to the quarterfinals in this year's third grand slam, he broke the rules again.
Wimbledon has a strict dress code.
The rules say that all players must wear white, from head to toe, as long as they are on the court.
But before the victory speech, Nick Kyrgios changed into red shoes and a red cap.
At the press conference afterwards, the Australian was asked why he deliberately broke the rules.
- Because I do what I want.