Geneva

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Roger Federer of Switzerland returns a ball to 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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Stanislas Wawrinka of Switzerland serves to Andrey Golubev of Kazakhstan during the first 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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Andrey Golubev of Kazakhstan returns a ball to Stanislas Wawrinka of Switzerland during the first 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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Stanislas Wawrinka, of Switzerland returns a ball to Andrey Golubev of Kazakhstan during the first 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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Former Secretary of State Hillary Rodham Clinton presents Russian Foreign Minister Sergey Lavrov with a "reset button" during their meeting in Geneva in 2009. (Associated Press) ** FILE **