If she manages to great through today and her QF, Kvitova will destroy her
You're right. Before the tournament I thought she shouldn't have problems with Kvitova if they meet since Maria defeated her the last few times they played and Petra normally doesn't play her best tennis in USA. But right now I'm really worried.
Ana Ivanovic / Sabine Lisicki / Elena Dementieva / Katarina Srebotnik / Polona Hercog