Two-time Australian Open champion Naomi Osaka stopped playing because of a strained abdominal muscle after dropping the opening set of her third-round match against Belinda Bencic on Friday. "I kind of have a history of it,

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 says she did everything she could to manage an abdominal strain that forced her to retire from her third-round match at Melbourne Park.