Alison Riske, United States, def. Polona Hercog, Slovenia, 3-6, 7-5, 6-3.

Ajla Tomljanovic, Australia, def. Rebecca Peterson, Sweden, 6-3, 6-3.

Antonia Lottner, Germany, def. Anastasija Sevastova (3), Latvia, 1-6, 6-3, 6-1.

Lucie Safarova (7), Czech Republic, def. Victoria Azarenka, Belarus, 6-3, 6-4.

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Lesley Kerkhove, Netherlands, and Lidziya Marozava, Belarus, def. Nadiia Kichenok, Ukraine, and Anastasia Rodionova (2), Australia, 6-7 (5), 7-5, 10-5.

Andreja Klepac, Slovenia, and Maria Jose Martinez Sanchez (1), Spain, def. Alicja Rosolska, Poland, and Abigail Spears, United States, 6-3, 6-1.