| date | Pair 1 | sets | Pair 2 | set 1 | set 2 | TB | dur (pts) | 
| Mon 15.10.18 | Julio Peralta / Horacio Zeballos |  CHI |  ARG | 1 | 2-0 | Evgeny Donskoy / Ivan Gakhov |  RUS |  RUS | WC | 6-3 | 6-4 |   | 1:02 (55-47) | 
| Mon 15.10.18 | Malek Jaziri / Nick Kyrgios |  TUN |  AUS |   | 2-0 | Mirza Basic / Damir Dzumhur |  BIH |  BIH |   | 6-1 | 6-3 |   | 0:46 (51-36) | 
| Wed 17.10.18 | Max Mirnyi / Philipp Oswald |  BLR |  AUT | 3 | 1-0 | Hugo Nys / Benoit Paire |  FRA |  FRA |   | 6-3 | 6-2 |   | 0:51 (54-34) | 
| Wed 17.10.18 | Nikola Mektic / Juergen Melzer |  CRO |  AUT | PR | 2-0 | Denys Molchanov / Igor Zelenay |  UKR |  SVK |   | 6-2 | 6-2 |   | 0:53 (55-37) | 
| Tue 16.10.18 | Andreas Mies / Hans Podlipnik-Castillo |  GER |  CHI |   | 2-1 | Jonathan Eysseric / Adrian Mannarino |  FRA |  FRA |   | 6-4 | 3-6 | [10-7] | 1:21 (67-58) | 
| Mon 15.10.18 | Karen Khachanov / Andrey Rublev |  RUS |  RUS |   | 2-0 | Marcin Matkowski / Nicholas Monroe |  POL |  USA | 4 | 6-4 | 7-5 |   | 1:03 (64-52) | 
| Tue 16.10.18 | Evgeny Karlovskiy / Daniil Medvedev |  RUS |  RUS | WC | 2-1 | D Bracciali / Andreas Seppi |  ITA |  ITA |   | 3-6 | 6-1 | [11-9] | 1:12 (62-51) | 
| Mon 15.10.18 | Austin Krajicek / Rajeev Ram |  USA |  USA | 2 | 2-0 | Roman Jebavy / Martin Klizan |  CZE |  SVK |   | 6-4 | 6-3 |   | 1:05 (61-50) |