PARIS — Novak Djokovic became the first big-name player to be eliminated from the men's tournament at the French Open, while Andy Roddick and Serena Williams managed to stick around.

Djokovic lost to No. 29 Philipp Kohlschreiber of Germany 6-4, 6-4, 6-4 in the third round today.

Roddick reached the fourth round for the first time by beating Marc Gicquel of France 6-1, 6-4, 6-4. Williams, the second seed, rallied to beat Maria Jose Martinez Sanchez of Spain 4-6, 6-3, 6-4.

The fourth-seeded Djokovic reached the semifinals at Roland Garros in each of the last two years, but could do little against Kohlschreiber while playing for the third time in three days.

"What is disappointing was that I couldn't find the rhythm throughout the whole match," said Djokovic, who completed a suspended three-set win from the previous round Friday. "I was trying not to be frustrated with a lot of unforced errors. Tried to be positive and just wait for the chances."

Djokovic finished the match with 38 unforced errors, 16 more than Kohlschreiber.

Fifth-seeded Juan Martin del Potro of Argentina also reached the fourth round, as did No. 5 Jelena Jankovic.

Roddick is only the second American to advance this far at the clay-court major since Andre Agassi in 2003, the same year Roddick won the U.S. Open. Robby Ginepri also made the fourth round in Paris last year.

"It's three matches," said Roddick, who had seven aces and only 11 unforced errors. "It's a lot better than I've done here before."

Roddick has reached at least the semifinals at the other three majors. Besides winning the 2003 U.S. Open, he also is a two-time runner-up at Wimbledon. But at the French Open, Roddick's best performance before this year was the third round in his 2001 debut.

"I like my chances maybe more than the other years," Roddick said. "I feel like I'm moving a little bit better on this stuff. I'm able to kind of slide into my forehand."

Del Potro beat Igor Andreev of Russia 6-4, 7-5, 6-4, while No. 9 Jo-Wilfried Tsonga of France, No. 11 Gael Monfils of France, No. 16 Tommy Robredo of Spain and Tommy Haas of Germany also gained the fourth round.

On the women's side, fourth-seeded Elena Dementieva lost to No. 30 Samantha Stosur of Australia 6-3, 4-6, 6-1. Dementieva's exit came a day after No. 3 Venus Williams lost in straight sets.

Stosur converted seven of her 15 break points against Dementieva, the 2004 runner-up at Roland Garros.

"I just feel I'm far away from ... being in good shape," Dementieva said. "I feel like I couldn't perform any better."

Stosur has never before reached the fourth round at the French. She made it that far at the 2006 Australian Open, but has never played in the quarterfinals at a major.

"As that match went on today I knew I could get there because I was playing (well) enough and was handling the conditions and everything maybe a little bit better than her," Stosur said.

Jankovic defeated 73rd-ranked Jarmila Groth of Australia 6-1, 6-1. No. 7 Svetlana Kuznetsova, the 2004 U.S. Open champion, beat Melinda Czink of Hungary 6-1, 6-3.

"I cruised through the match and did my job, did what I had to do in order to win," said Jankovic, who started the season at No. 1 but has dropped to No. 5.

No. 9 Victoria Azarenka of Belarus completed her comeback over No. 22 Carla Suarez Navarro of Spain 5-7, 7-5, 6-2. Suarez Navarro won the first set Friday and Azarenka took the second before play was suspended because of darkness.

No. 12 Agnieszka Radwanska of Poland, No. 24 Aleksandra Wozniak of Canada and unseeded Virginie Razzano of France also advanced.