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

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.

The top brass of world tennis returned to the status quo on day eight of the Australian Open, with the big names picking up wins.