Ernesto Escobedo, United States, def. John Isner (2), United States, 7-6 (6), 6-7 (6), 7-6 (5).

Thomaz Bellucci (8), Brazil, def. Sam Querrey (3), United States, 6-4, 3-6, 6-3.

Steve Johnson (4), United States, def. Fernando Verdasco (5), Spain, 6-2, 6-4.

Dustin Brown, Germany, and Frances Tiafoe, United States, defF. Rogerio Dutra Silva, Brazil, and Adil Shamasdin, Canada, 4-6, 6-1, 10-5.

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Julio Peralta, Chile, and Horacio Zeballos (4), Argentina, def. Santiago Gonzalez, Mexico, and Michael Venus, New Zealand, 6-3, 7-6 (4).