It wasn't enough for Bethanie Mattek-Sands to take Sara Errani out of the Porsche Tennis Grand Prix; today, she did away with Sabine Lisicki, too. That means that Angelique Kerber is the only German standing. Kerber defeated Yaroslava Shvedova in the quarterfinals. And it took three sets, but defending champion Maria Sharapova to put Ana Ivanovic out of the competition.
If ever there were two top players who were a mess, it would be Petra Kvitova and Li Na. Both are very talented, and both are apt to "go off" without warning. Today, it was Kvitova who really went off; Li defeated her 6-3, 7-5. But Li took a difficult path to victory. She had to serve for the match three times, and the third set score went from 5-2 to 5-all, once Kvitova got going. It wasn't enough, though, and Li will now play Mattek-Sands in the semifinals.
Both Mattek-Sands and Kerber have their work cut out for them. As good a defender as Kerber is, her serve will really have to be on for her to beat Sharapova.
Question: Does Kvitova lack a "warrior instinct"? Discuss.