it matter who is wrong initially. if Russia and USA get into nuclear war and destroy the world,, who is wrong ? everybody ?Carlos was attempting to coach Serena, probably deserved a warning. Carlos was wrong.
Serena over-reacted and breaking her racket was beneath her as was her temper tantrum after she received the penalty. Serena was wrong.
The umpire went over-the-top with the game penalty because Serena called him a thief. If you're that thin-skinned you have no right to be an umpire and much worse is said to umpires every day without any repercussions. Umpire was wrong.
Serena calling this sexism, is harmful to women. It minimizes what "sexism" actually is. There were two women on that court and for Serena to claim "sexism" is illogical and stupid. Serena was wrong.
The US Open fans that booed Osaka are idiots. Osaka played a brilliant game, she is a big part of the future of Women's tennis and she deserved cheers and a standing ovation. US Open fans were wrong.