U.S. Open women's singles results

NEW YORK, Aug. 31 (Xinhua) -- Following are the results from the U.S. Open at USTA Billie Jean King National Tennis Center on Tuesday (prefix number denotes seeding):

Women's singles first round

Ajla Tomljanovic, Australia, bt Katie Volynets, United States, 6-3, 6-1

Zhang Shuai, China, bt Hailey Baptiste, United States, 6-3, 6-4

30-Petra Martic, Croatia, bt Dalma Galfi, Hungary, 6-3, 6-2