When tennis players grow frustrated during matches (which is quite often it seems), we sometimes see them smash up their racquets, bite back at their coaches or even get into it with the chair umpires.
All of the above aren't particularly uncommon.
But it appears one player let his anger get the better of him and went to extreme lengths to punish himself for his costly mistakes.
Sweden's Mikael Ymer was hammered 6-2 6-4 6-3 by Stefanos Tsitsipas at the Australian Open.
And midway through the straight sets defeat, Ymer's frustrations reached boiling point.
In between one of the sets, the Swede became so enraged with his performance that he began punching himself in the face.
It made for pretty worrying scenes as a few of the members in the crowd looked on in concern.
We've witnessed some pretty angry outbursts from tennis players in the past, but this one surely ranks among the top alongside the likes of John McEnroe's "you cannot be serious" rant and even Nick Kyrgios' infamous incident with the chair umpire at Cincinnati in 2019.
Featured Image Credit: Twitter/Channel NineTopics: Tennis, Video, Australian Open, Mikael Ymer, watch, Stefanos Tsitsipas, Australia