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.

Two-time defending Australian Open champion Aryna Sabalenka extended a few impressive streaks on Friday while becoming one of the first players to advance to the fourth round of the year's opening Grand Slam tournament.

Naomi Osaka ’s return to Grand Slam competition ended prematurely on Friday, as the two-time Australian Open champion was forced to retire from her third-round match against Belinda Bencic due to a strained abdominal muscle. Osaka had dropped the opening set in a tiebreaker, 7-6 (3), before informing the chair umpire she could no longer continue.