This is true. Mouratoglou admitted afterwards that he was coaching, and even said everyone does it on every play, including the men. He specifically named Uncle Tony coaching Rafa on every play. Said he didn't know why it was being enforced now.
The dumb counts coach even admitted after that he was coaching her. Yet she still refused to admit it.
It's all excuses. The fact of the matter is Osaka was going to beat her, come hell or high water. The serve was working. She was fighting off break points left and right AGAIN. She beat a bish 6-0, 6-0 earlier in the tourney. lol.. Serena was going to lose anyways.