Naomi Osaka Defeats Serena To Win US Open

Naomi Osaka of Japan has won US Open after defeating Serena Williams of the United States.

Osaka became the first Japanese woman to win a Grand Slam title as her idol Serena Williams imploded in the face of a code violation from the chair umpire on Saturday.

Osaka, 20, triumphed 6-2, 6-4 in the match.