Belarusian Aryna Sabalenka, the top seed, defeated Canadian Leylah Fernandez, the No 31 seed, 6-3, 7-6 (2) to reach the last 16 of the US Open at the USTA Billie Jean King National Tennis Center in New York on Friday night.
Sabalenka, ranked No 1, will face Spaniard Cristina Bucsa next.
New York (Grand Slam), other third-round results (USTA Billie Jean King National Tennis Center, hard, USD 90.000.000, most recent results first):
Beatriz Haddad Maia vs. Maria Sakkari
Anna Kalinskaya vs. Iga Swiatek
Amanda Anisimova vs. Jaqueline Cristian
Ekaterina Alexandrova vs. Laura Siegemund
Daria Kasatkina vs. Naomi Osaka
Diane Parry vs. Marta Kostyuk
Magdalena Frech vs. Coco Gauff
Linda Noskova vs. Karolina Muchova
Taylor Townsend vs. Mirra Andreeva
Barbora Krejcikova beat Emma Navarro (10): 4-6, 6-4, 6-4
Ann Li beat Priscilla Hon (Q): 7-5, 6-3
Cristina Bucsa beat Elise Mertens (19): 3-6, 7-5, 6-3
Jessica Pegula (4) beat Victoria Azarenka: 6-1, 7-5
Marketa Vondrousova beat Jasmine Paolini (7): 7-6 (4), 6-1
Elena Rybakina (9) beat Emma Raducanu: 6-1, 6-2