South Africa's Kevin Anderson serves against Serbia's Novak Djokovic during their men's singles fourth round match on day eight of the 2015 Wimbledon Championships at The All England Tennis Club in Wimbledon, southwest London, on July 7, 2015. Djokovic won 6-7, 6-7, 6-1, 6-4, 7-5. RESTRICTED TO EDITORIAL USE -- AFP PHOTO / ADRIAN DENNIS (Photo credit should read ADRIAN DENNIS/AFP via Getty Images)
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