Naomi Osaka says she needs to wear a wig and sunglasses to stay anonymous in Japan since her profile soared into the stratosphere after her stunning victory at the US Open. Her achievement in New York made her the first player from her country to win a major, and with it came fanatical support.

She's not complaining, but took precautions when back there recently. "I mean, I didn't really walk outside. I just went in the car and stuff," she said after winning through to the quarters of the Australian Open yesterday.