Ilya Ivashka, Belarus, def. Emil Ruusuvuori, Finland, 6-4, 6-1.
Benjamin Bonzi, France, def. Alejandro Tabilo, Chile, 6-3, 4-2, ret.
Tallon Griekspoor, Netherlands, def. Feliciano Lopez, Spain, 7-6, 7-6.
Antoine Bellier, Switzerland, def. Federico Delbonis, Argentina, 6-3, 7-6 (6).
Roberto Bautista Agut (5), Spain, def. Taro Daniel, Japan, 6-4, 7-6.
Lucas Miedler and Alexander Erler, Austria, def. Joao Sousa, Portugal, and Sebastian Baez, Argentina, 7-5, 3-6, 10-4.
Aslan Karatsev, Russia, and Joran Vliegen, Belgium, def. Maximo Gonzalez, Argentina, and Andrey Golubev (4), Kazakhstan, 7-6 (1), 7-6 (6).