Some of the biggest names in tennis are dropping like flies as Wimbledon continues to turn into a survival of the fittest.
Add Maria Sharapova to that growing list.
Sharapova, the top seed on the women's side, fell to German Sabine Lisicki in straight sets, 6-4, 6-3 in the fourth round of the tournament. Lisicki had lost her previous three matches against Sharapova, including a loss to Sharapova in the semifinals of last year's Wimbledon.
"It's just unbelievable" Lisicki said. "For the third time I've beaten the French Open champion here. I'm just so happy. I've lost the three previous meetings against her. Now I just played well and beat her for the first time."
Serena Williams and defending champ Petra Kvitova were able to avoid the upset bug and move on to the quarterfinals. Williams defeated Yaroslava Shvedova of Kazakhstan, 6-1, 2-6, 7-5 and Kvitova rallied to beat Francesca Schiavone, 4-6, 7-5, 6-1.
"I feel fine," Williams said. "I'm not tired. I'm not anything. I feel good. I feel like, bottom line, I can play so much better than what I have been playing. ...You know me. I'm never satisfied."