While Naomi Osaka is busy competing — and winning — at the Australian Open, she needed to send someone to retrieve her 1 1/2-year-old daughter’s birth certificate from their California home in case it ...

Naomi Osaka's Australian Open campaign has taken on an element of doubt after the four-time Grand Slam champion and former No ...

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