Naomi Osaka, a two-time champion in Australia, stopped playing because of a strained abdominal muscle after dropping the first set of her match against Tokyo Olympics gold medalist Belinda Bencic.

Coco Gauff moved into the fourth round at Melbourne Park with a straightforward victory over Leylah Fernandez.

Defending champion Aryna Sabalenka was pushed to the limit in setting up an Australian Open showdown with talented teenager Mirra Andreeva on Friday