David Marrero of Spain, second left, and Fernando Verdasco of Spain, right, shake hands after defeating Bob Bryan and Mike Bryan of the United States in the final of the ATP World Tour Finals doubles tennis match at the O2 Arena in London Monday, Nov. 11, 2013. (AP Photo/Sang Tan)

Britain Tennis ATP Finals

David Marrero of Spain, second left, and Fernando Verdasco of Spain, right, shake hands after defeating Bob Bryan and Mike Bryan of the United States in the final of the ATP World Tour Finals doubles tennis match at the O2 Arena in London Monday, Nov. 11, 2013. (AP Photo/Sang Tan)

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