LONDON, ENGLAND - JULY 02: Petra Kvitova of Czech Republic plays a backhand during the Ladies' Singles quarter-final match against Kirsten Flipkens of Belgium on day eight of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 2, 2013 in London, England. (Photo by Mike Hewitt/Getty Images)
Wimbledon quarterfinal action
Wimbledon has been anything but predictable. The tournament has tested these athletes and sent home many top seeds.