Denis Istomin of Uzbekistan plays a return to Stan Wawrinka of Switzerland during their men's singles match at the All England Lawn Tennis Championships in Wimbledon, London, Monday, June 30, 2014. (AP Photo/Alastair Grant)

Britain Wimbledon Tennis

Denis Istomin of Uzbekistan plays a return to Stan Wawrinka of Switzerland during their men's singles match at the All England Lawn Tennis Championships in Wimbledon, London, Monday, June 30, 2014. (AP Photo/Alastair Grant)

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