Mike Bryan of United States, left, and Bob Bryan of United States make a joke on court after they play a return to Aisam-Ul-Haq Qureshi of Pakistan and Jean-Julien Rojer of the Netherlands during their ATP World Tour Finals tennis match at the O2 Arena in London, Thursday, Nov. 7, 2013. (AP Photo/Kirsty Wigglesworth)

Britain Tennis ATP Finals

Mike Bryan of United States, left, and Bob Bryan of United States make a joke on court after they play a return to Aisam-Ul-Haq Qureshi of Pakistan and Jean-Julien Rojer of the Netherlands during their ATP World Tour Finals tennis match at the O2 Arena in London, Thursday, Nov. 7, 2013. (AP Photo/Kirsty Wigglesworth)

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