Iva Jovic (10), United States, def. Dayana Yastremska, Ukraine, 6-4, 6-1.

Karolina Muchova (6), Czechia, def. Caty McNally, United States, 3-6, 7-6 (1), 7-6 (4).

Diana Shnaider (11), Russia, def. Yulia Putintseva, Kazakhstan, 6-2, 6-2.

Jasmine Paolini (15), Italy, def. Nikola Bartunkova, Czechia, 7-6 (5), 6-3.

Janice Tjen, Indonesia, def. Daria Snigur, Ukraine, 7-5, 6-3.

Hanyu Guo, China, def. Katie Volynets, United States, 6-4, 4-6, 7-6 (3).

Jelena Ostapenko, Latvia, def. Jessica Pegula (2), United States, 2-6, 7-6 (7), 6-3.

Ashlyn Krueger, United States, def. Lanlana Tararudee, Thailand, 2-6, 6-1, 6-1.

Ann Li, United States, def. Aryna Sabalenka (1), Belarus, 3-6, 6-4, 7-6 (5).

Leylah Fernandez, Canada, def. Han Shi, China, 6-3, 6-4.

Diana Shnaider (11), Russia, def. Karolina Muchova (6), Czechia, 7-5, 6-3.

Nicole Melichar-Martinez, United States, and Cristina Bucsa (5), Spain, def. Xinyu Jiang and Wang Xiyu, China, 6-3, 6-4.

Ingrid Neel, Estonia, and Giuliana Olmos, Mexico, def. Maja Chwalinska, Poland, and Nikola Bartunkova, Czechia, 3-6, 6-1, 10-7.

Sara Errani and Jasmine Paolini (8), Italy, def. Olivia Nicholls, Britain, and Tereza Mihalikova, Slovakia, 4-6, 6-2, 10-5.

Zhang Shuai, China, and Anna Danilina (2), Kazakhstan, def. Anhelina Kalinina and Dayana Yastremska, Ukraine, walkover.

Hsieh Su-wei, Taiwan, and Jelena Ostapenko (4), Latvia, def. Irina Khromacheva, Russia, and Sofia Kenin, United States, 2-6, 7-6 (0), 10-7.