Naomi Osaka defeated Petra Kvitova, 7-6 (2), 5-7, 6-4, on Saturday to win the Australian Open

MELBOURNE, Australia — Naomi Osaka defeated Petra Kvitova, 7-6 (2), 5-7, 6-4, on Saturday to
win the Australian Open and become the first Japanese player to attain the No. 1 singles ranking in women’s tennis.
It was the second consecutive major title for the fourth-seeded Osaka, 21, who defeated Serena Williams in straight sets at the United States Open in September. The last woman to win back-to-back Grand Slam singles titles was Williams, who claimed the first three majors in 2015.