Två dagar före starten av Wimbledon åkte stjärnan Naomi Osaka på ett rejält bakslag.

The former world No 1 is seeded 14th at Wimbledon, and is scheduled to play her first-round match against Elsa Jacquemot on Monday afternoon.

Osaka received medical attention down 3-0 in the first set against Karolína Muchová, then retired early in the second.