Serena had a meltdown. But the sequence of the penalty sequence was mind boggling. Literally, every coach does what Serena's coach did and to get pulled on that is absolutely ridiculous. Rightly or wrongly, sport at this level is on fine margins and Serena completely blew it today. To be fair, she must know that nobody ever gets pulled up on 'coaching' ever. Brilliant performance by Osaka and probably many more in the years to come.
By the way, some of you lot going on as if Serena Williams is some uncontrollable freak of a drama queen, feck sake