After losing a couple of points following two double faults and netting a backhand, Williams smashed her raquete into the ground, inviting a second code violation for "racquet abuse".
The American star was fined for coaching, racquet abuse and for verbal abuse when she accused umpire Carlos Ramos of being "a thief" during the stormy final.
Williams, who was seeking a record-equalling 24th Grand Slam singles tile on Saturday, vigorously disputed each of the violations during the match.
The second violation also cost her a point in the match, sparking her renewed verbal attack on Ramos, a code violation which carried a US$10,000 fine. "But then when I hugged her at the net.", Osaka explained as she began to tear up.
"I can't sit here and say I wouldn't say he's a thief, because I thought he took a game from me", Williams said.
Williams said she hoped that her taking a stand would enable women to be freer in the future. I'm just a tennis player playing another tennis player. She was telling me to think of it as just another match and then I would yell at her, 'Are you insane?
Current player Victoria Azarenka claimed the same violations wouldn't have been handed down if it was in a men's match. "Maybe it didn't work out for me, but it's going to work out for the next person".
"I'll tell her, first of all, if she sees it, that, you know, I stood up for what I believed in. [Naomi] played well. This is her first grand slam", Williams said.
A few games later, Williams slammed her racquet and broke it.
"I've seen other men call other umpires several things and I'm here fighting for women's rights and for women's equality and for all kinds of stuff, and for me to say thief and for him to take a game, it made me feel like it was a sexist remark".
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Osaka's sister Mari is also a tennis player and they were coached by their father after he chose to try to copy Richard Williams' remarkable success with his daughters. "This is outrageous", said Williams, before leaving her press conference to applause.
Osaka's current clothing contract with adidas runs out at the end of the year and she is now perfectly positioned to secure a multi-million-dollar deal, along with many other endorsements.
"This is outrageous", said Williams warming to her theme.
"Because the young player outplayed her in the first set, I think pressure got her more than anything". I feel so sorry for Naomi Osaka. 'I think I was able to do that because it was my first Grand Slam final.
"Being called a cheater, she felt even more humiliated", Mouratoglou said.
"I would tell them, "Don't do it", she said with a laugh at the idea of being someone's idol. I'm not sure if they were happy tears or they were just sad tears, because of the moment.
Under Article III, Section P of the Grand Slam Rule Book, "verbal abuse" is defined as "a statement about an official, opponent, sponsor, spectator or other person that implies dishonesty or is derogatory, insulting or otherwise abusive".
She will head to Tokyo from NY ahead of the Pan Pacific Open, beginning on September 17, and it is likely to be some homecoming for the player born in Japan but raised in the United States.
"It's weird in the women's game where they have coaching", said Barker.
"If they can't adhere to the rules then they will have to allow the coaching because we can't have things like this outburst anymore".