Former world No. 1 Naomi Osaka retired from the ASB Classic final in Auckland on Sunday due to an abdominal injury after winning the first set against Clara Tauson.

Naomi Osaka’s fitness for the Australian Open is in question after the four-time Grand Slam champion and former No. 1 suffered an apparent abdominal injury while playing the final of a WTA tournament in Auckland.

The former world No. 1 and four-time Grand Slam champion retired from the final of the WTA Auckland Open, the last tune-up before the Australian Open, with an apparent medical issue on Sunday. She had been leading Denmark's Clara Tauson 6-4 before her exit left Tauson as the tournament's champion.

Naomi Osaka is set to undergo an MRI to determine the extent of her abdominal injury but notes that she is feeling positive that it is nothing more than a minor issue that won't prevent her from competing at the Australian Open.

Naomi Osaka retired from the Auckland final in shocking and devastating scenes as the No. 7 seed was up by a set when she had to call a medical timeout and call it a day. On Sunday, the former world No.

Former world No. 1 Naomi Osaka started the new year on a high, reaching her first WTA Tour quarterfinal in six months with a 7-5, 6-3 win over Julia Grabher in Auckland.

Naomi Osaka's quest for a first title in four years ended in heartbreak as the former world number one retired with an injury after winning the opening set of the Auckland Classic final against Denmark's Clara Tauson on Sunday.