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.

Novak Djokovic, Coco Gauff roll to Australian Open's 4th round. Naomi Osaka retires due to injury and Jessica Pegula was upset in the third round.

Aryna Sabalenka, Coco Gauff, Novak Djokovic and Carlos Alcaraz will all be on show during day eight of the Australian Open. Follow live.

While there have been plenty of surprises in the men’s bracket so far, most of the top women have progressed through the draw without an issue.

Novak Djokovic stepped up a level in his Australian Open third round match against Tomas Machac, brushing the Czech aside 6-1, 6-4, 6-4 with a vintage performance to reach the second week at Melbourne Park for the 17th time.

"I was slightly surprised, to be honest, with the result."