Katie Boulter will face the winner of the match between Chinese Yue Yuan and Belarusian Aryna Sabalenka, the second seed, next.

Boulter defeated American qualifier Bernarda Pera (6-4, 3-6, 6-1) in the previous round of the Rogers Cup.

In the first round of the WTA National Bank Open, the Brazilian edged out Marie Bouzkova (5-7, 6-2, 7-6 (1)).

Toronto WTA 1000, other second-round results (Aviva Centre, hard, USD 3.211.715, most recent results first):

• Naomi Osaka vs. Elise Mertens
• Yue Yuan vs. Aryna Sabalenka
• Victoria Azarenka vs. Greet Minnen
• Paula Badosa vs. Jelena Ostapenko
• Daria Kasatkina vs. Amanda Anisimova
• Peyton Stearns vs. Madison Keys: thursday
• Ashlyn Krueger vs. Leylah Fernandez: thursday
• Emma Navarro vs. Magda Linette: thursday
• Taylor Townsend (LL) beat Marina Stakusic (WC): 6-0, 6-2
• Liudmila Samsonova (6) beat Moyuka Uchijima (Q): 6-4, 6-2
• Coco Gauff (1) beat Yafan Wang (Q): 6-4, 6-4
• Anna Kalinskaya (10) beat Lesia Tsurenko: 6-2, 6-2
• Marta Kostyuk (11) beat Elina Svitolina: 6-2, 2-6, 6-2
• Diana Shnaider (14) beat Magdalena Frech: 2-6, 6-3, 7-6 (5)
• Jessica Pegula (3) beat Karolina Pliskova: 7-5, 6-4