Two-time Australian Open champion Naomi Osaka has stopped playing because of an injury after dropping the opening set of her third-round match against 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.

Naomi Osaka retired from her Australian Open third round match on Friday. The Japanese tennis star had just lost the opening set to Belinda Bencic via a tiebreak (7-3) before pulling the plug. It marked the first time she had withdrawn from a grand slam tournament match in her career.