Petra Martic (2), Croatia, def. Naomi Broady, Britain, 6-1, 6-1.

Soria Kenin (5), United States, def. Mona Barthel, Germany, 6-3, 6-4.

Pauline Parmentier (8), France, def. Christina McHale, United States, 6-2, 4-6, 7-5.

Monica Puig (3), Puerto Rico, def. Madison Brengle, United States, 7-5, 3-0, retirement.

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Heather Watson, Britain, def. Leylah Fernandez, Canada, 6-4, 7-5.

Varvara Lepchenko, United States, def. Marie Bouzkova, Czech Republic, 6-1, 1-6, 6-3.

Christina McHale, United States, and Galina Voskoboeva, def. Beatrice Gumulya, India, and Ana Veselinovic, Montenegro, 6-7 (5), 6-2, 10-7.

Desirae Krayczyk, United States, and Giuliana Olmos (3), Mexico, def. Pei Hsuan Chen and Fang-Hsien Wu, Taiwan, 6-3, 6-1.

Natela Dzalamidze and Veronika Kudermetova (4), Russia, def. Naomi Broady, Britain, and Kristyna Pliskova, Czech Republic, 2-6, 6-4, 10-7.