Maria Sharapova has pulled out of next week’s WTA tournament at Stanford with a left hip injury, TENNIS.com has learned. Sharapova injured her hip while taking a hard fall in her second-round loss to Michelle Larcher de Brito at Wimbledon. The world No. 3 will return to play at the Rogers Cup in Toronto.

Serena Williams, the defending Stanford champion, may not defend her title as she is playing a clay-court tournament in Bastad, Sweden this week. However it is likely that Stanford will ask her to reconsider and take a wild card. At the moment, world No. 4 Agnieszka Radwanska is the top seed at Stanford. Wimbledon champion Marion Bartoli is also scheduled to play, although there has been talk that she is considering pulling out of Stanford and Carlsbad, which takes place the following week.