Germany's Sabine Lisicki has already booked her place in the last four.

After beating Serena Williams yesterday, the 23rd seed has just registered a straight-sets victory over Kaia Kanepi of Estonia, winning out 6-3, 6-3.

Agnieszka Radwanska also advanced to the semis after a 2 sets to 1 win over China's Li Na. Radwanska took the first set but Na hit back to level.

However the Pole took the deciding set 6 - 2.

Later this afternoon, 2011 champion Petra Kvitova goes up against Kirsten Flipkens while Sloane Stephens will face Marion Bartoli.