Terence Atmane, France, def. Mattia Bellucci, Italy, 6-7 (4), 7-6 (2), 7-6 (5).

Karen Khachanov (5), Russia, def. Tomas Machac, Czechia, 6-2, 4-6, 7-6 (7).

Daniil Medvedev (1), Russia, def. Sho Shimabukuro, Japan, 6-2, 6-1.

Alexander Bublik (3), Kazakhstan, def. Fabian Marozsan, Hungary, walkover.

Yuki Bhambri, India, and Ryan Seggerman (4), United States, def. Alexander Donski, Bulgaria, and Filip Pieczonka, Poland, 7-6 (6), 7-6 (2).

Jackson Withrow and Nathaniel Lammons, United States, def. Jason Kubler and John Peers, Australia, 7-6 (1), 7-6 (3).

Evan King, United States, and N. Sriram Balaji (3), India, def. Jean-Julien Rojer, Netherlands, and Theodore Winegar, United States, 6-4, 5-7, 10-6.