Jaume Munar, Spain, def. Federico Cina, Italy, 6-4, 6-3.

Martin Damm Jr, United States, def. Yannick Hanfmann, Germany, 7-5, 6-3.

Alex Michelsen (5), United States, def. Andrea Guerrieri, Italy, 6-1, 6-2.

Robert Galloway, United States, and Constantin Frantzen, Germany, def. Michael Venus, New Zealand, and Petr Nouza, Czechia, 6-4, 6-2.

Botic Van de Zandschulp and Tallon Griekspoor, Netherlands, def. Juan Manuel Cerundolo, Argentina, and Benjamin Kittay, United States, 7-6 (0), 6-3.

Sadio Doumbia, France, and Bart Stevens (4), Netherlands, def. Maximo Gonzalez and Andres Molteni, Argentina, 6-4, 7-5.