Paris ? Roger Federer lost three of his first four service games Wednesday, causing a stir among French Open fans but only briefly delaying his progress to the semifinals. The top-ranked Federer rallied to defeat Fernando Gonzalez, 2-6, 6-2, 6-3, 6-4, and reach the final four at his 16th consecutive Grand Slam event.

Seeking the only major title he has yet to win, Federer next will face unseeded Frenchman Gael Monfils, who beat No. 5-seeded David Ferrer, 6-3, 3-6, 6-3, 6-1. No. 2 Rafael Nadal, the three-time defending champion, will play No. 3 Novak Djokovic in the other semifinal Friday.