US Open women's final - highlights

Flashpoint: Serena Williams argues with chair umpire Carlos Ramos while playing Naomi Osaka in the US Open final

Set-by-set highlights of Saturday's stormy US Open women's singles final between Serena Williams and Naomi Osaka which was won by the Japanese star:

Set 1

Osaka 6-2

+ Osaka strikes for a 2-1 lead off a Serena double fault and backs it up as an ace gives her a 3-1 lead

+ Error-plagued Serena broken again and Osaka is 4-1 ahead

+ Osaka confidently serves out the opener after 34 minutes

Key set statistic: Unforced errors - Williams 13/Osaka 5

Set 2

Osaka 6-4

+ In second game, Williams gets code violation for coaching. She tells umpire Carlos Ramos she was just getting a thumbs up: "I don't cheat to win; I'd rather lose. I'm just letting you know that," says the American.

+ On a 19-shot rally, Osaka saves break point in fourth game but buckles on the fourth and Serena edges ahead 3-1

+ Williams broken back at 3-2, destroys racquet, gets point penalty and tells Ramos: "You owe me an apology."

+ Williams is then docked a game to go 3-5 down for calling Ramos "a thief" and breaks down in tears on court as she engages in furious tirade against tournament officials.

+ Osaka keeps composure to take title as Serena continues to insist on apology from Ramos.

Key match statistics: Williams 21 unforced errors, six double faults -- a game penalty and accusations of umpire being "thief".

Post-match:

Williams: "I know you guys were here rooting, but let's make this the best moment we can. Let's give everyone the credit where credit is due. Let's not boo any more."

Osaka: "I know everyone was cheering for her and I'm sorry it had to end like this."