| date | Pair 1 | sets | Pair 2 | set 1 | set 2 | TB | dur (pts) | 
| Tue 16.10.18 | Maximo Gonzalez / Nicolas Jarry |  ARG |  CHI |   | 2-1 | Ben Mclachlan / Jan-Lennard Struff |  JPN |  GER | 1 | 7-5 | 2-6 | [13-11] | 1:33 (64-72) | 
| Wed 17.10.18 | Marcelo Demoliner / Santiago Gonzalez |  BRA |  MEX |   | 2-0 | Ruben Bemelmans / Jorus de Loore |  BEL |  BEL | WC | 6-2 | 7-63 |   | 1:21 (66-53) | 
| Mon 15.10.18 | Robin Haase / Matwe Middelkoop |  NED |  NED | 3 | 2-1 | Guido Pella / Diego Schwartzman |  ARG |  ARG |   | 6-75 | 7-65 | [13-11] | 1:49 (92-89) | 
| Tue 16.10.18 | Gerard Granollers / Marcel Granollers |  ESP |  ESP |   | 2-0 | David Marrero / Leonardo Mayer |  ESP |  ARG |   | 6-3 | 6-4 |   | 1:04 (57-46) | 
| Tue 16.10.18 | Makenzie McDonald / Cameron Norrie |  USA |  GBR |   | 2-1 | Sander Arends / Romain Arneodo |  NED |  FRA |   | 6-3 | 6-75 | [10-8] | 1:22 (77-71) | 
| Wed 17.10.18 | Divij Sharan / Artem Sitak |  IND |  NZL | 4 | 2-0 | Leander Paes / Miguel Angel Reyes-Varela |  IND |  MEX |   | 7-5 | 6-4 |   | 1:11 (62-47) | 
| Tue 16.10.18 | Feliciano Lopez / Jaume Munar |  ESP |  ESP |   | 2-0 | Sander Gille / Joran Vliegen |  BEL |  BEL | WC | 7-66 | 7-63 |   | 1:33 (76-75) | 
| Tue 16.10.18 | Nicolas Mahut / Edouard Roger-Vasselin |  FRA |  FRA | 2 | 2-0 | Philipp Petzschner / Frances Tiafoe |  GER |  USA |   | 6-2 | 6-2 |   | 0:52 (52-34) |