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Andy Roddick reached the fourth round of the French Open for the first time in his career. ((Patrick Kovarik/AFP/Getty Images))

Andy Roddick reached the fourth round of the French Open for the first time in his career Saturday, by beating Marc Gicquel of France 6-1, 6-4, 6-4.

Roddick is only the second American to reach the fourth round at Roland Garros since Andre Agassi in 2003, the same year Roddick won his only major title at the U.S. Open. Robby Ginepri also made the French Open's fourth round 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 Grand Slam tournaments. Besides winning the 2003 U.S. Open, he is also a two-time runner-up at Wimbledon.

Novak Djokovic became the first big-name player to be eliminated from the men's tournament, losing to No. 29 Philipp Kohlschreiber of Germany 6-4, 6-4, 6-4 Saturday.

The fourth-seeded Serb reached the semifinals at Roland Garros in each of the last two years, but he 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 on 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.

"He didn't give me a lot of chances. But yet again, I didn't work for those chances," Djokovic said. "This is the problem. I played too passive, and he played really solid from all the strokes."

Second-seeded Roger Federer and No. 5 Juan Martin del Potro of Argentina also reached the fourth round, as did No. 2 Serena Williams and No. 5 Jelena Jankovic from the women's draw.

Federer, who was again stretched to four sets before beating Paul-Henri Mathieu of France 4-6, 6-1, 6-4, 6-4, said the loss of Djokovic wasn't a big deal for him. The two were in the same side of the draw and could have met in the semifinals.

"Winning the semifinal is not winning the tournament, so it doesn't change anything," Federer said.

Tommy Haas of Germany also advanced to the fourth round, beating Jeremy Chardy of France 7-5, 6-3, 4-6, 6-4. Fifth-seeded del Potro beat Igor Andreev of Russia 6-4, 7-5, 6-4, while No. 11 seed Gael Monfils of France also moved on.

On the women's side, No. 24 Aleksandra Wozniak of Blainville, Que., became the first Canadian woman to reach the second week at the French Open since Patricia Hy-Boulais in 1992 as she defeated Lourdes Dominguez Lino 6-2, 3-6, 6-3.

No. 4 Elena Dementieva was upset by No. 30 Samantha Stosur of Australia 6-3, 4-6, 6-1 and follows third-seeded Venus Williams out of the tournament. The American lost in straight sets on Friday.

Toronto's Daniel Nestor and Serbian partner Nenad Zimonjic advanced to the third round in men's doubles with a 6-4, 6-2 win over Czech duo Leos Friedl and David Skoch.

Kuznetsova advances

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 reached the fourth round at the clay-court Grand Slam tournament. She reached the same stage at the 2006 Australian Open, but has never made the quarter-finals at a major.

Wozniak rebounded from a shaky second set to defeat Spanish clay specialist Dominguez Lino 6-2, 3-6, 6-3 in a third-round match that topped two hours.

Wozniak is the first Canadian to earn a fourth-round place at a Grand Slam since Maureen Drake at the Australian Open a decade ago.

In the fourth round, she will meet Serena Williams, who rallied to beat Maria Jose Martinez Sanchez of Spain 4-6, 6-3, 6-4.

Jankovic and No. 7 Svetlana Kuznetsova also easily advanced to the fourth round.

Jankovic had little trouble against 73rd-ranked Jarmila Groth of Australia, winning 6-1, 6-1, while Kuznetsova beat Melinda Czink of Hungary 6-1, 6-3.

"I was just doing my thing," Kuznetsova said. "I was depending on myself and not on her…I think I controlled all of the match."

Kuznetsova, the 2004 U.S. Open champion, reached the French Open final in 2006 but lost to Justine Henin.

No. 9 Victoria Azarenka of Belarus completed her comeback over 22nd-seeded Carla Suarez Navarro of Spain 5-7, 7-5, 6-2 on Saturday. No. 12 Agnieszka Radwanska of Poland also was victorious.

In her victory over Martinez Sanchez, Williams was broken once in the first set, but she complained about the final point, which she believed hit her opponent's body. Martinez Sanchez said the ball hit her racket.

"The ball did touch her 100 per cent on her arm," Williams said. "The rules of tennis is when the ball hits your body, then it's out of play. You lose a point automatically. So the ball hit her body, and therefore, she should have lost the point instead of cheating."