Maximo Gonzalez, Argentina, and Nicolas Jarry, Chile, def. Marco Cecchinato, Italy, and Dusan Lajovic, Serbia, 6-4, 6-1.
Nikola Mektic, Croatia, and Horacio Zeballos (3), Argentina, def. Austin Krajicek, United States, and Artem Sitak, New Zealand, 7-6 (1), 6-1.
Roman Jebavy, Czech Republic, and Andres Molteni, Argentina, def. Malek Jaziri, Tunisia, and Leonardo Mayer, Argentina, 2-6, 6-2, 10-6.
Juan Sabastian Cabal and Robert Farah (2), Colombia, def. Nicholas Monroe, United States, and Miguel Angel Reyes-Varela, Mexico, 6-4, 6-1.
Marcelo Melo and Bruno Soares (1), Brazil, def. Fabio Fognini, Italy, and Juan Ignacio Londero, Argentina, 7-6 (7), 3-6, 10-8.
Marcelo Demoliner, Brazil, and Frederik Nielsen, Denmark, def. Pablo Cuevas, Uruguay, and Marc Lopez, Spain, 6-0, 7-6 (6).
Luke Bambridge and Jonny O’Mara, Britain, def. Thiago Monteiro and Fernando Romboli, Brazil, 2-6, 6-3, 13-11.