Petra Kvitova of Czech Republic stretches to play a return to Lucie Safarova of Czech Republic during their women's singles semifinal match at the All England Lawn Tennis Championships in Wimbledon, London, Thursday, July 3, 2014. (AP Photo/Ben Curtis)

APTOPIX Britain Wimbledon Tennis

Petra Kvitova of Czech Republic stretches to play a return to Lucie Safarova of Czech Republic during their women's singles semifinal match at the All England Lawn Tennis Championships in Wimbledon, London, Thursday, July 3, 2014. (AP Photo/Ben Curtis)

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