The Davis Cup

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Italy's Fabio Fognini twirls his shirt around as he celebrates with teammates his victory in the Davis Cup first round tennis match against Argentina's Guido Pella with his team in Buenos Aires, Argentina, Monday, Feb. 6, 2017.(AP Photo/Natacha Pisarenko)

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Former soccer star Diego Maradona cheers as he attends the Davis Cup first round tennis match between Italy's Fabio Fognini and Argentina's Guido Pellain Buenos Aires, Argentina, Monday, Feb. 6, 2017.(AP Photo/Natacha Pisarenko)

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Argentina's Guido Pella returns the ball to Italy's Fabio Fognini during the Davis Cup first round tennis match in Buenos Aires, Argentina, Monday, Feb. 6, 2017.(AP Photo/Natacha Pisarenko)

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Italy's Fabio Fognini returns the ball to Argentina's Guido Pella during the Davis Cup first round tennis match in Buenos Aires, Argentina, Monday, Feb. 6, 2017.(AP Photo/Natacha Pisarenko)

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FILE - In this Sunday, Nov. 29, 2015 file photo, Britain's Andy Murray, center, holds up the Davis Cup as the team celebrates after Andy Murray defeated Belgium's David Goffin at the Flanders Expo in Ghent, Belgium. Andy Murray ended Britain's wait for the Davis Cup at 79 years when his lob finished off Belgium's David Goffin in the final in Ghent a year ago. (AP Photo/Alastair Grant, File)

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Switzerland's Roger Federer falls to the clay after defeating France's Richard Gasquet and winning the Davis Cup final between France and Switzerland at Stade Pierre Mauroy in Lille, northern France, Sunday, Nov. 23, 2014. (AP Photo/Peter Dejong)

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Switzerland's Roger Federer, returns a ball to Andrey Golubev, of Kazakhstan, during the fourth tennis single match of the Davis Cup World Group Quarterfinal match between Switzerland and Kazakhstan, at Palexpo, in Geneva, Switzerland, Sunday, April 6, 2014. Federer won the decisive singles match on Sunday to give Switzerland a 3-2 win over Kazakhstan in the Davis Cup and a spot in the semifinals for the first time in 11 years. (AP Photo / Keystone, Salvatore Di Nolfi)

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France's Gael Monfils celebrates with teammates Michael llodra, left, and Julien Benneteau, right, after winning his singles match against German player Peter Gojowczyk, in the quarterfinals of the Davis Cup in Nancy, eastern France, Sunday April 6, 2014. France qualifies for the semifinals with a 3-2 score.(AP Photo/Remy de la Mauviniere)