Stanislas Wawrinka

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Kazakhstan's Andrey Golubev, left, watched by his doubles partner Aleksandr Nedovyesov, right, returns the ball to Switzerland's Roger Federer and Stanislas Wawrinka, during their doubles match of the tennis Davis Cup World Group quarterfinal match between Switzerland and Kazakhstan in Geneva, Switzerland, Saturday, April 5, 2014. (AP Photo/Keystone,Salvatore Di Nolfi)

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Switzerland's Stanislas Wawrinka, front left, watched by his doubles partner Roger Federer, front right, returns the ball to Kazakhstan's Aleksandr Nedovyesov, back right, and Andrey Golubev,during their doubles match of the tennis Davis Cup World Group quarterfinal match between Switzerland and Kazakhstan, in Geneva, Switzerland, Saturday, April 5, 2014.(AP Phtoo/Keystone,Salvatore Di Nolfi)

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Switzerland's Stanislas Wawrinka, right, watched by his doubles partner Roger Federer, left, left, returns the ball to Kazakhstan's Aleksandr Nedovyesov, and Andrey Golubev, during their doubles match of the tennis Davis Cup World Group quarterfinal match between Switzerland and Kazakhstan, in Geneva, Switzerland, Saturday, April 5, 2014.(AP Phtoo/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 reacts after losing a point against 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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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)