Naomi Osaka became the first Japanese woman to win a Grand Slam title on Saturday as her idol Serena Williams angrily imploded, calling the chair umpire in the US Open final "a thief".
Osaka, 20, triumphed 6-2, 6-4 in the match marred by Williams's second set outburst, the American enraged by umpire Carlos Ramos's warning for receiving coaching from her box.
She tearfully accused him of being a "thief" and angrily demanded an apology from the official.
When a second code violation for racquet abuse was handed out to her -- along with a point penalty -- Williams exploded.
"You're attacking my character," she said. "You will never, ever be on another court of mine. You are the liar," she fumed and Ramos handed her a game penalty that put Osaka one game from victory at 5-3 in the second set.
Williams won the next game, and continued her tearful remonstrations with a supervisor on the changeover but Osaka -- who displayed remarkable poise throughout -- held serve to seal a historic win for her country.