Two other seeded players won, while two lost on the hard courts of Olympic Park.
Third-seeded Kaia Kanepi of Estonia beat Rika Fujiwara of Japan 6-2, 6-7 (5), 6-0, and No. 8 Chan Yung-jan of Taiwan defeated Mara Santangelo of Italy 1-6, 6-3, 6-4.
Fourth-seeded Carla Suarez Navarro of Spain and seventh-seeded Marina Erakovic of New Zealand lost, however. Suarez Navarro lost to Klara Zakopalova of Czech Republic 6-1, 6-7 (3), 6-4, and Erakovic fell to Samantha Stosur of Australia 6-2, 6-0.
Other winners included Ayumi Morita of Japan, Lucie Safarova of the Czech Republic, Stephanie Dubois of Canada, Jill Craybas of the United States, Ekaterina Makarova of Russia and Anastasia Pivovarova of Russia.
U.S. Open Show Court Schedules
WC Debate: Who Are The Greatest-Ever World Cup Nation?
U.S. Open results
