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LONDON, ENGLAND - JUNE 29: Petra Kvitova of The Czech Republic plays a backhand during the Ladies Singles second round match against Sorana Cirstea of Romania on day three of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on June 29, 2016 in London, England. (Photo by Clive Brunskill/Getty Images)

LONDON, ENGLAND - JUNE 29:  Petra Kvitova of The Czech Republic plays a backhand during the Ladies Singles second round match against Sorana Cirstea of Romania on day three of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on June 29, 2016 in London, England.  (Photo by Clive Brunskill/Getty Images)