BEIJING (AP) - U.S. Open champion Naomi Osaka and second-ranked Caroline Wozniacki both advanced to the second round of the China Open on Monday.
The eighth-seeded Osaka beat Zarina Diyas 6-4, 6-3, while Wozniacki defeated Belinda Bencic 6-2, 6-3.
Osaka will next face Danielle Collins, who advanced on Sunday.
In second-round matches, 10th-seeded Julia Goerges advanced after U.S. Open quarterfinalist Lesia Tsurenko retired with a back injury with the score even at 6-4, 4-6, 2-2, while Anastasija Sevastova advanced with a walkover win against Madison Keys.
Other first-round winners included Garbine Muguruza, Zhang Shuai and Petra Martic.
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