The Davis Cup

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French tennis players Michael Llodra, right, and Julien Benneteau, left, celebrate winning their doubles match with against German pair Andre Begemann and Tobias Kamke, in the quarterfinals of the Davis Cup between France and Germany, in Nancy, eastern France, Saturday, April 5, 2014. Germany still leads with a 2-1 score.(AP Photo/Remy de la Mauviniere)

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French supporters encourage their team, during the double match between French players Michael Llodra, Julien Benneteau, and German pair Andre Begemann, Tobias Kamke, in the quarterfinals of the Davis Cup between France and Germany, in Nancy, eastern France, Saturday April 5, 2014.(AP Photo/Remy de la Mauviniere)

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Roger Federer, of Switzerland, celebrates after beating Mikhail Kukushkin of Kazakhstan during the second single match of the Davis Cup World Group Quarterfinal match between Switzerland and Kazakhstan in Geneva, Switzerland, Friday, April 4, 2014. (AP Photo/Keystone, Salvatore Di Nolfi)

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German tennis player Peter Gojowczyk celebrates after winning his single match against French player Jo-Wifried Tsonga, in the quarterfinals of the Davis Cup in Nancy, eastern France, Friday April 4, 2014. Germany leads 2-0 at the end of the first day..(AP Photo/Remy de la Mauviniere)