Fourth seed Sara Errani, former world No. 1 Caroline Wozniacki and 2011 Wimbledon champion Petra Kvitova were among the opening-round winners Tuesday at the 2013 U.S. Open.
The former French Open runner-up Errani, of Italy, double-bageled helpless Aussie Olivia Rogowska, 6-0, 6-0, while the sixth-seeded Dane and 2009 U.S. Open runner-up Wozniacki topped Chinese Duan Ying-Ying, 6-2, 7-5, and the seventh-seeded Czech slugger Kvitova got past Japanese fellow left-hander Misaki Doi in three sets, 6-2, 3-6, 6-1, in 1 hour, 55 minutes on a warm, breezy Day 2 at the USTA Billie Jean King National Tennis Center.
"In the first round of Grand Slams it's difficult all the time so you have to be focused," said Kvitova, who was a runner-up in New Haven, Conn., last week. "I didn't play my game all the match. I didn't have focus. I have to have more confidence."
Kvitova, who captured Wimbledon in 2011, has never made it past the fourth round in New York. Her second-round opponent on Thursday will be capable Serb Bojana Jovanovski.
Meanwhile, 10th-seeded Italian Roberta Vinci, a U.S. Open quarterfinalist a year ago, handled Hungarian Timea Babos, 6-4, 6-2, 13th-seeded former world No. 1 and former French Open champ Ana Ivanovic, also a 2012 quarterfinalist in Flushing, pasted Georgian Anna Tatishvili, 6-2, 6-0, and 14th-seeded Russian Maria Kirilenko mauled Belgian Yanina Wickmayer, 6-1, 6-1.
In other action involving seeds, Ukrainian Elina Svitolina drove out No. 17 Slovak Dominika Cibulkova, 6-4, 6-3; Israeli Julia Glushko doused No. 20 Russian Nadia Petrova 6-3, 6-4; No. 22 Russian Elena Vesnina drilled German Annika Beck 6-1, 6-1; No. 26 Alize Cornet, of France, downed Portuguese Maria Joao Koehler 6-3, 6-2; and Taipei's Su-Wei Hsieh knocked out No. 31 Czech Klara Zakopalova 6-3, 6-3. The one-time world No. 3 Petrova has dropped her last six matches on tour.
In matches involving Americans, Christina McHale defeated German Julia Goerges, 6-4, 6-3; 18-year-old Sachia Vickery made her WTA debut by topping Croat Mirjana Lucic-Baroni, 6-4, 6-4; Italian Karin Knapp drilled Grace Min, 6-3, 6-1; Romanian Alexandra Dulgheru took out Varvara Lepchenko, 6-7 (5-7), 6-2, 7-6 (7-5); and Italian Flavia Pennetta crushed Nicole Gibbs, 6-0, 6-2. Pennetta will tangle with her fellow Italian Errani on Thursday.