Flushing Meadows, NY (My Sportsbook) - Defending champion Kim Clijsters and Venus Williams took easy third-round wins Friday at the U.S. Open.

The second-seeded Clijsters dropped the first three games of her match against 27th-seeded Czech Petra Kvitova, but wound up taking the final 12 to complete a 6-3, 6-0 victory at Arthur Ashe Stadium.

"A match like this today probably gives me more satisfaction because, you know, I beat a good player without even playing my best tennis," Clijsters said. "There were moments in there that I was very satisfied with the way I was playing, and just overall the way I was moving, the way that I was serving."

The Belgian, who has won 17 straight matches at Flushing Meadows, will face Serbian Ana Ivanovic in the fourth round in a battle of former world No. 1s.

Ivanovic beat Frenchwoman Virginie Razzano 7-5, 6-0, to continue her resurgence. The former French Open champion had not reached the fourth round at the U.S. Open since 2007, bowing out in the first round last year, and had not advanced beyond the second round at any of the three prior Grand Slam events this season.

"I really feel I'm playing a lot better, sort of things are starting to come back, come together out on the court as well," Ivanovic said. "So I'm really thrilled about that."

Clijsters has had more success at the U.S. Open than Ivanovic, winning the title in 2005 and 2009. She is aiming to become the first woman to successfully defend her U.S. Open crown since Williams in 2001.

Williams, the No. 3 seed, is looking to win her third Open title and took another step through the bracket with a 6-2, 6-1 victory over Luxembourg's Mandy Minella.

Williams used powerful groundstrokes to dominate rallies, and though she committed 30 unforced errors, still took the win in a little more than an hour.

Williams' fourth-round opponent will be 16th-seeded Israeli Shahar Peer, who advanced with a 6-4, 6-4 decision over 19th-seeded Italian Flavia Pennetta.

Sixth-seeded French Open champ Italian Francesca Schiavone moved on with a 6-1, 7-5 victory over the Ukraine's Alona Bondarenko, the 29th seed. Schiavone will next face 20th-seeded Russian Anastasia Pavlyuchenkova after she handled Argentine Gisela Dulko 6-1, 6-2.

Earlier winners Friday included Samantha Stosur of Australia and Russia's Elena Dementieva.

The fifth-seeded Stosur thumped Italy's Sara Errani, 6-2, 6-3, while the 12th- seeded Dementieva was a 7-5, 6-2 winner over Slovakia's Daniela Hantuchova. Stosur and Dementieva will meet in the fourth round.