Argentina's Horacio Zeballos celebrates winning the final men's singles against Spain's Rafael Nadal at the Chilean Open tennis tournament in Vina del Mar city February 10, 2013. © Action Images

Spain's Rafael Nadal reacts after losing the final men's singles against Argentina's Horacio Zeballos. © Action Images

Argentina's Horacio Zeballos holds up his trophy. © Gallo Images

Argentina's Horacio Zeballos (L) poses with his trophy after winning the final men's singles against Spain's Rafael Nadal. © Gallo Images

Russia's Elena Vesnina and Ekaterina Makarova celebrate with teammates after winning their doubles match against Japan's Ayumi Morita and Misaki Doi during day two of the Federation Cup 2013 World Group Quarterfinal match between Russia and Japan at Olympic Stadium on February 10, 2013 in Moscow, Russia.. © Gallo Images

Italy's Roberta Vinci celebrates with team members after defeating Jamie Hampton of the U.S. during their match in the Fed Cup first round tennis tournament in Rimini February 10, 2013. © Action Images