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(140407) -- GENEVA, April 7, 2014 (Xinhua) -- Roger Federer (R) of Switzerland celebrates with his teammate Stanislas Wawrinka after the men's singles match against Andrey Golubev of Kazakhstan at the Davis Cup quarterfinal at Palexpo in Geneva, Switzerland, April 6, 2014. Federer won 3-0. Switzerland beat Kazakhstan 3-2 to enter the semifinal. (Xinhua/Wang Siwei)