CBS News September 8, 2018, 5:55 PM Naomi Osaka upsets Serena Williams in U.S. Open
Naomi Osaka, of Japan, adjusts her hat during a match against Serena Williams in the women's final of the U.S. Open tennis tournament, Saturday, Sept. 8, 2018, in New York.
Adam Hunger / AP
Last Updated Sep 8, 2018 5:56 PM EDT
Naomi Osaka defeated Serena Williams at the U.S. Open on Saturday, becoming the first Japanese player to win a Grand Slam singles championship. Osaka won the contentious match 6-2-, 6-4.
Williams was given three code violations by chair umpire Carlos Ramos, the third leading to an automatic loss of a game in the second set.
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