American Danielle Collins, the No 13 seed, won against Frenchwoman Caroline Garcia, the No 22 seed, 6-3, 6-3 to advance to the last 16 of the Italian Open at the Foro Italico in Roma on Sunday evening.
Collins, ranked No 15, will play Romanian Irina-Camelia Begu next.
The American benefited from the abandonment of Russian Anna Blinkova (6-4, 0-0) ahead of her victory.
In the previous round of the Rome tournament, Garcia, ranked No 23, beat Italian Elisabetta Cocciaretto (6-2, 7-6 (5)).
Roma WTA 1000, other round of 32 results (Foro Italico, clay, USD 5.509.771, most recent results first):
- Elina Svitolina (16) beat Anna Kalinskaya (23): 6-3, 6-3
- Victoria Azarenka (24) beat Mayar Sherif: 6-2, 6-7 (6), 6-3
- Jelena Ostapenko (9) beat Sara Sorribes Tormo: 6-4, 5-7, 6-1
- Aryna Sabalenka (2) beat Dayana Yastremska (32): 6-4, 6-2
- Rebecca Sramkova (Q) beat Sofia Kenin: 6-4, 4-6, 6-4
- Irina-Camelia Begu beat Elise Mertens (27): 6-2, 6-0
- Maria Sakkari (5) beat Anhelina Kalinina (30): 7-6 (4), 6-0
- Coco Gauff (3) beat Jaqueline Cristian (LL): 6-1, 0-6, 6-3
- Sorana Cirstea (28) beat Marketa Vondrousova (6): 7-6 (1), 6-3
- Madison Keys (18) beat Beatriz Haddad Maia (12): 6-4, 4-6, 6-3
- Qinwen Zheng (7) beat Linda Noskova (29): 3-6, 6-1, 6-2
- Naomi Osaka beat Daria Kasatkina (10): 6-3, 6-3
- Angelique Kerber beat Aliaksandra Sasnovich (Q): 6-3, 7-6 (4)
- Paula Badosa beat Diana Shnaider: 5-7, 6-4, 6-4
- Iga Swiatek (1) beat Yulia Putintseva: 6-3, 6-4
