Flushing Meadows, NY (Sports Network) - Reigning champion Serena Williams was an easy second-round winner, while Sara Errani became the highest-seeded loser to this point at the 2013 U.S. Open.
The world No. 1, four-time U.S. Open titlist Williams blitzed Kazakhstan's Galina Voskoboeva 6-3, 6-0 in 69 minutes at Ashe Stadium in a match that was postponed because of rain on Wednesday.
The reigning U.S. and French Open champ beat reigning Australian Open queen Victoria Azarenka in last year's finale in New York. The 16-time Grand Slam champion Williams is also a two-time runner-up in Flushing.
Up next for Williams will be another Kazakh, Yaroslava Shvedova.
Meanwhile, Flavia Pennetta sent her fourth-seeded fellow Italian Errani packing, 6-3, 6-1, Thursday at the USTA Billie Jean King National Tennis Center. The 31-year-old Pennetta reached three U.S. Open quarterfinals from 2008-11 before missing last year's edition of her best Grand Slam event due to a right wrist injury.
The 26-year-old Errani was the French Open runner-up and a U.S. Open semifinalist last year.
Eighth-seeded German left-hander Angelique Kerber held off promising Canadian Eugenie Bouchard, 6-4, 2-6, 6-3, resurgent Serb Jelena Jankovic, seeded ninth at this fortnight, whipped Russian Alisa Kleybanova, 6-3, 6-2, and 10th-seeded Italian Roberta Vinci overcame Czech Lucie Safarova, 4-6, 6-1, 6-2. The 24- year-old Kleybanova returned to the WTA earlier this month after battling Hodgkin's lymphoma, a form of cancer, over the last two years.
The French Open quarterfinalist Jankovic is a former world No. 1 who lost to Serena Williams in the 2008 U.S. Open finale.
Wimbledon runner-up Sabine Lisicki, seeded 16th in Flushing, drilled Argentine Paula Ormaechea, 6-2, 6-3.
In other second-round action involving seeds, Japan's Kurumi Nara surprised No. 19 Romanian Sorana Cirstea 7-5, 6-1; Italian Karin Knapp upended No. 22 Russian Elena Vesnina 6-1, 6-4; No. 24 Russian Ekaterina Makarova doused American Bethanie Mattek-Sands 6-4, 6-4; No. 25 Estonian Kaia Kanepi dismissed Slovak Anna Schmiedlova 6-4, 6-1; No. 26 Alize Cornet of France subdued Croat Ajla Tomljanovic 6-2, 6-2; and No. 27 Russian Svetlana Kuznetsova held off Chinese Peng Shuai 6-1, 4-6, 6-4. The former top-five star Kuznetsova captured the U.S. Open title in 2004 and was the runner-up in New York in 2007.
Additionally, American Christina McHale bested Ukrainian Elina Svitolina 6-4, 3-6, 7-5 and the aforementioned Shvedova handled Austrian Patricia Mayr- Achleitner 6-2, 6-3.