NEW YORK -- Top-seeded Caroline Wozniacki has defeated Chang Kai-chen of Taiwan 6-0, 6-0 to advance to the third round of the U.S. Open.
Wozniacki needed only 47 minutes in Arthur Ashe Stadium on Thursday to put the "double bagel" on Chang. The Dane won 52 points to only 24 for her opponent.
"I'm pretty disappointed, but not embarrassed," Chang said. "I know it's in front of a lot of people and on TV and stuff. But things happen."
Wozniacki is seeking a return trip to the U.S. Open final, where she lost to Kim Clijsters last year. She earned the top seed when world No. 1 Serena Williams withdrew because of a foot injury.
"I've been playing really good tennis," said Wozniacki, who has lost a total of two games in two matches.
Earlier, American teen Beatrice Capra upset 18th-seeded Aravane Rezai of France 7-5, 2-6, 6-3 to reach the third round in her Grand Slam debut, and Wimbledon runner-up Vera Zvonareva beat 94th-ranked Sabine Lisicki of Germany 6-1, 7-6 (5).
Capra, 18, is a wild-card entry and the youngest player left in the women's field and the lowest-ranked, at 371st. She is from Ellicott City, Md., and trains at the Evert Academy in Florida.
This is the first tour-level, main-draw event of Capra's career. She knocked off 95th-ranked Karolina Sprem in the opening round. Capra will next face Maria Sharapova, a 6-1, 6-2 winner over Iveta Benesova.
"When I was younger, I used to always look up to her," Capra said about 2006 U.S. Open champion Sharapova, who is all of 23 now, "and so I think it will be a really good match for me to see where I am compared to that kind of level."
Sharapova, who is looking for her second U.S. Open title and fourth overall in the Grand Slam tournaments, was asked in her postmatch, on-court interview about playing Capra.
"That's the great thing about the U.S. Open," said Sharapova, who represents Russia but moved to Florida as a kid. "To see young Americans doing well."
Capra is even more of an outsider than Melanie Oudin was last year at the U.S. Open when, at age 17, Oudin beat Sharapova en route to the quarterfinals.
Rezai twice has reached the fourth round at major tournaments.
"The match depends on me, because I did a lot of errors," Rezai said. "She did nothing very exceptional. Not many winners. A lot of lucky balls on the line."
The No. 7-seeded Zvonareva now has made it to the third round at Flushing Meadows in seven of her eight trips to the tournament. But the Russian never has made it to the U.S. Open quarterfinals.
Zvonareva is trying to follow up on her first Grand Slam final; she lost to Williams at the All England Club in July.
Lisicki hasn't won consecutive matches in 2010. She missed five months with an injured left ankle.
In other results, No. 4 Jelena Jankovic defeated Mirjana Lucic 6-4, 3-6, 6-2 for her second straight three-set victory; Peng Shuai of China rallied to beat No. 9 Agnieszka Radwanska of Poland 2-6, 6-1, 6-4; 2004 U.S. Open champion Svetlana Kuznetsova of Russia, seeded 11th, defeated Anastasija Sevastova of Latvia 6-2, 6-3; No. 15 Yanina Wickmayer of Belgium beat Julia Goerges of Germany 6-4, 7-5; Patty Schnyder of Switzerland upset No. 22 Maria Jose Martinez Sanchez of Spain 7-6 (2), 6-4; No. 23 Maria Kirilenko of Russia rallied past Yvonne Meusburger of Austria 4-6, 7-5, 6-0; No. 25 Alexandra Dulgheru of Romania defeated Sofia Arvidsson of Sweden 7-6 (5), 6-1; and No. 31 Kaia Kanepi of Estonia beat Akgul Amanmuradova of Uzbekistan 6-2, 6-4.
Information from The Associated Press was used in this report.