Czech Republic

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Rafael Nadal of Spain plays a return to Lukas Rosol of the Czech Republic during a second round men's singles match at the All England Lawn Tennis Championships at Wimbledon, England, Thursday, June 28, 2012. (AP Photo/Anja Niedringhaus)

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Andy Murray of Britain plays a return to Tomas Berdych of the Czech Republic during their singles tennis match at the ATP World Tour Finals in London Monday, Nov. 5, 2012. (AP Photo/Kirsty Wigglesworth)

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Czech Republic's Tomas Berdych returns the ball to Argentina's Carlos Berlocq during the Davis Cup semifinals tennis match in Buenos Aires, Argentina on Sunday, Sept. 16, 2012. (AP Photo/Eduardo Di Baia)

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Britain's Andy Murray adjusts his cap while playing Czech Republic's Tomas Berdych during a semifinal match at the 2012 US Open tennis tournament, Saturday, Sept. 8, 2012, in New York. (AP Photo/Mike Groll)

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Bob, left, and Mike Bryan react while playing Radek Stepanek of the India's Leander Paes and Czech Republic's Radek Stepanek during the men's doubles final of the 2012 US Open tennis tournament, Friday, Sept. 7, 2012, in New York. (AP Photo/Mike Groll)

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Serena Williams reacts after winning her match against Czech Republic's Andrea Hlavackova in the fourth round of play at the 2012 US Open tennis tournament, Monday, Sept. 3, 2012, in New York. (AP Photo/Kathy Willens)

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United States' Serena Williams, left, celebrates with partner Venus Williams, right, after defeating Czech Republic's Lucie Hradecka and Andrea Hlavackova in a women's doubles gold medal tennis match at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, Sunday, Aug. 5, 2012. (AP Photo/Victor R. Caivano)