Switzerland's Roger Federer, left, speaks with his doubles partner Stanislas Wawrinka, right, during their doubles match of the Davis Cup World Group Quarterfinal match between Switzerland and Kazakhstan  in Geneva, Switzerland, Saturday, April 5, 2014.  (AP Photo/Keystone,Salvatore Di Nolfi)

Switzerland Tennis Davis Cup

Switzerland's Roger Federer, left, speaks with his doubles partner Stanislas Wawrinka, right, during their doubles match of the 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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