WORLD number one Japanese player Naomi Osaka retired from her Cincinnati Masters quarter-final with an apparent knee injury on Friday.
Osaka, who was playing American Sofia Kenin, sought treatment on the knee in the third set, then pulled out. Kenin was ahead 6-4 1-6 2-0 at the time.
The injury comes less than two weeks before the start of the US Open, where Osaka is the defending champion. - Reuters