World No.2 and former Wimbledon champion Maria Sharapova is set to face World No. 5 Samantha Stosur in the Porshe Tennis Grand Prix.
The World No.5 had to fight hard to overcome Germany's Julia Goerges in round two. She beat the German in three well-contested sets 6-2,2-6,6-3.
Marion Bartoli the conquerer of World No.1 Victoria Azarenka in Miami was beaten her by the host nation's Mona Barthel and claimed her second top scalp this week.
After registering a straight sets win over former World No. Ana Ivanovic, the German powered through into the quarterfinals beating Bartoli 6-3,6-1 arrowing 7 aces.
"My opponent had nothing to lose, that makes a first time head-to-head difficult," said Bartoli of Barthel "Mona played a lot tougher than I thought. I had watched her playing Ana and had noticed that she has a hard serve and strong strokes." The former Wimbledon finalist continued "But I was still surprised about how fast she could play, I virtually had no chance to defend, especially on this slippery surface, at times it left like I was playing on ice.This court contributed to Mona's game as she is very tall and can play very fast, so it was very hard for me to break her rhythm. I am sure the match between us would look very different on a hard court."
Li Na the French Open Champion however, had no such issues as the Chinese No.1 overcame Akgul Amanmuradova of Uzbekistan in straight sets 6-4,6-4. Petra Kvitova was also dominant and outclassed Francesca Schiavone of Italy to set up a quarterfinal clash with rising German Angelique Kerber.