Grigor Dimitrov (9), Bulgaria, def. Andrey Rublev (6), Russia, 6-3, 7-6 (3), 1-6, 3-6, 6-3.
Taylor Fritz (12), United States, def. Casper Ruud (8), Norway, 3-6, 6-4, 6-3, 6-2.
Paula Badosa (26), Spain, def. Wang Yafan, China, 6-1, 6-2.
Marcel Granollers, Spain, and Horacio Zeballos (1), Argentina, def. Yuki Bhambri, India, and Albano Olivetti, France, 6-2, 6-2.
Gabriela Dabrowski, Canada, and Erin Routliffe (1), New Zealand, def. Angelica Moratelli, Italy, and Jaqueline Adina Cristian, Romania, 7-5, 7-6 (3).
Zhang Shuai, China, and Kristina Mladenovic, France, def. Anastasia Pavlyuchenkova and Mirra Andreeva, Russia, 6-2, 6-4.
