Naomi Osaka pulls out of Japan Open with back injury

In her last-16 match at the China Open, against eventual champion Coco Gauff, Osaka retired at the end of the second set because of a back injury.

Naomi Osaka pulls out of Japan Open with back injury
In her last-16 match at the China Open, against eventual champion Coco Gauff, Osaka retired at the end of the second set because of a back injury.