Defending champion Naomi Osaka moved into the last 32 at the Australian Open with a straight-sets win over China’s Saisai Zheng.
The Japanese third seed took one hour 20 minutes to see off the world number 42 6-2 6-4 on Margaret Court Arena.
Osaka, 22, now faces a potential third-round meeting with US teenager Coco Gauff, who plays Sorana Cirstea later.
American 14th seed Sofia Kenin also progressed against compatriot Ann Li, beating the wildcard 6-1 6-3.
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