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. “I kind of have a history of it,

Swiss Belinda Bencic advanced to the last 16 of the Australian Open after two-time champion Naomi Osaka retired during Friday's third-round match with an abdominal strain that has affected her since the start of the season.

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 It marked the first time she had withdrawn from a grand slam tournament match in her career.