Marcelo Melo of Brazil, left, and Ivan Dodig of Croatia play a return to Bob Bryan of the United States and Mike Bryan of the United States during their ATP World Tour Finals double tennis match at the O2 Arena in London Tuesday, Nov. 5, 2013. (AP Photo/Sang Tan)

Britain Tennis ATP Finals

Marcelo Melo of Brazil, left, and Ivan Dodig of Croatia play a return to Bob Bryan of the United States and Mike Bryan of the United States during their ATP World Tour Finals double tennis match at the O2 Arena in London Tuesday, Nov. 5, 2013. (AP Photo/Sang Tan)

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