What the 2018 final will forever be remembered for is the way Williams clashed with chair umpire Carlos Ramos, demanding an apology after he initially issued a warning for a code violation in the second set's second game for receiving coaching, which is not allowed during Grand Slam matches.
Williams was left hugely emotional as she repeatedly confronted umpire Carlos Ramos after he handed her a coaching violation before docking her a point and then a game in a dramatic second set.
"I don't cheat to win", she told Ramos.
Williams was handed multiple controversial penalties in the match, including one that cost her a game and put Osaka up, 5-3, in the second (and final) set.
"You definitely can't go back in time but 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.
"There's a lot of men out here that have said a lot of things, but because they're men that (punishment) doesn't happen to them. More voices are needed to do the same".
"If I'm honest I was coaching, I don't think she looked at me", he said. She then addressed Williams directly: "I'm really glad I was able to play with you".
This left Ramos with no choice but to hand out a game penalty, meaning Williams was on serve but Osaka was just one game away from history.
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Williams received a second violation when she smashed her racket in frustration.
Naomi Osaka of Japan (L) poses with Serena Williams before their Women's Singles Finals match at the 2018 US Open in New York, Sept. 8, 2018. She also told Ramos, who she later called a good umpire, that her team had no coaching signals and had never talked about doing so during a match. "What Serena has accomplished this year in playing her way back on to the tour is truly awesome", Adams said in the statement.
Yes, I was coaching just like everybody else.
The 36-year-old, who was bidding for a seventh US Open title in NY, was clearly agitated.
The game penalty came as a culmination of an on-going argument between Williams and Ramos.
"It's hard to say because I always fight till the end and I always try to come back, no matter what".
"I just feel like the fact that I have to go through this is just an example for the next person that has emotions and that wants to express themselves and wants to be a strong woman", she continued.
"When are you going to give me my apology". Viewers also offered an outpouring of sympathy for Osaka, whose first Grand Slam win is tied up in the controversy.
After the match Williams, playing in her third Grand Slam since giving birth to her daughter last September, took a more measured perspective on whether tournament officials had targeted her in an event she has won six times.