NEW YORK, Sept. 3 (Xinhua) -- Following are the U.S. Open women's singles results on Monday (prefix denotes seeding):

Women's Singles

Fourth Round

14-Madison Keys, United States, bt 29-Dominika Cibulkova, Slovakia, 6-1, 6-3

20-Naomi Osaka, Japan, bt 26-Aryna Sabalenka, Belarus, 6-3, 2-6, 6-4

Lesia Tsurenko, Ukraine, bt Marketa Vondrousova, Czech Republic, 6-7 (3), 7-5, 6-2

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