Switzerland's Roger Federer serves to Chile's Fernando Gonzalez during their quarter-final match at the French Open tennis tournament at Roland Garros in Paris June 4, 2008. The top-ranked Federer defeats Fernando Gonzalez 2-6, 6-2, 6-3, 6-4 and reaches the semifinals. (Xinhua/Reuters Photo)

Switzerland's Roger Federer returns the ball to Chile's Fernando Gonzalez during their quarter-final match at the French Open tennis tournament at Roland Garros in Paris June 4, 2008.(Xinhua/Reuters Photo)