During a media conference, Williams said the umpire "alleged that I was cheating, and I wasn't cheating", referring to her coach Mouratoglou's gestures towards her during the match. "You are the liar", she fumed and Ramos handed her a game penalty for a third violation - verbal abuse - that put Osaka one game from victory at 5-3 in the second set.
"He's never taken a game from a man because they said "thief", the 36-year-old added. "I have a daughter and I stand for what's right for her", Williams told Ramos on the court. In the ensuing conversation, the previous cheating accusation came up and Williams demanded an apology for accusing her of cheating.
Williams said the incident strengthened her belief that women players are treated differently to their male counterparts in the sport. This is not fair. "More voices are needed to do the same", she said.
The first was for receiving illegal on-court coaching from her coach Patrick Mouratoglou.
"When a woman is emotional, she's "hysterical" and she's penalized for it", King wrote on Twitter. I can promise you, that's not coaching, racquet abuse no doubt, but the verbal abuse???
Williams was penalized a game by the chair umpire for an argument in which she called him a thief.
We take a detailed look at Serena Williams' mental breakdown that ultimately cost her the US Open title on Saturday. "Ramos had rescued his ego and, in the act, taken something from Williams and Osaka that they can never get back".
"It still feels really weird because I've never beaten Madison before", Osaka said.
This wasn't the first outburst Williams had at the U.S. Open. I just want to tell you guys, she played well.
'But you can not deny there have been a lot worse situations and I'm not going to name names.
"It can't be a grey area anymore and maybe there has to be a supervisor that comes on to have the final say before you give a game away".
But during the trophy ceremony, Osaka had tears in her eyes and addressed the crowd and its loud booing saying, "I know that everyone was cheering for [Serena] and I'm sorry it had to end like this". Viewers also offered an outpouring of sympathy for Osaka, whose first Grand Slam win is tied up in the controversy.
All of 20, Naomi Osaka shocked the tennis world as she beat legendary Serena Williams to win her maiden Grand Slam at the Flushing Meadows. And they're going to be allowed to do that because of today.
U.S. Open officials came onto the court to explain the rules to Williams while she argued that she was being targeted because of her gender.