| date | Pair 1 | sets | Pair 2 | set 1 | set 2 | TB | dur |
| Mon 22.01.18 C2 | Storm Sanders / Marc Polmans |  AUS | AUS | WC | 2-0 | Latisha Chan / Jamie Murray |  TPE |  GBR | | 7-68 | 6-4 | | 1:28 |
| Tue 23.01.18 C2 | Maria Martinez Sanchez / Marcelo Demoliner |  ESP |  BRA | | 2-0 | Hao-Ching Chan / Michael Venus | TPE |  NZL | | 6-2 | 6-1 | | 0:47 |
| Mon 22.01.18 C2 | Abigail Spears / Juan Sebastian Cabal |  USA |  COL | | 2-1 | Kveta Peschke / Henri Kontinen |  CZE |  FIN | | 3-6 | 6-3 | [10-8] | 1:19 |
| Tue 22.01.18 C2 | Timea Babos / Rohan Bopanna |  HUN |  IND | | 2-0 | Vania King / Franko Skugor | USA |  CRO | | 6-4 | 6-4 | | 1:06 |
| Tue 22.01.18 MC | Andrea Hlavackova / Edouard Roger-Vasselin | CZE |  FRA | | 2-0 | Nadiya Kichenok / Marcel Granollers |  UKR | ESP | | 6-2 | 7-5 | | 1:08 |
| Mon 22.01.18 C2 | Ekaterina Makarova / Bruno Soares |  RUS | BRA | | 2-1 | Samantha Stosur / Sam Groth | AUS | AUS | | 6-74 | 6-3 | [11-9] | 1:19 |
| Tue 22.01.18 MC | Gabriela Dabrowski / Mate Pavic |  CAN | CRO | 8 | 2-0 | Demi Schuurs / Jean-Julien Rojer |  NED | NED | | 6-1 | 6-3 | | 0:52 |
| Mon 22.01.18 C3 | Johanna Larsson / Matwe Middelkoop |  SWE | NED | | 2-0 | Casey Dellacqua / John Peers | AUS | AUS | | 6-3 | 7-65 | | 1:12 |
| date | Pair 1 | sets | Pair 2 | set 1 | set 2 | TB | dur |
| Upper half |
| Sun 21.01.18 C2 | Latisha Chan / Jamie Murray | TPE | GBR | | 0-0 | Andrea Klepac / Rajeev Ram |  SLO | USA | | 4-6 | 7-5 | [11-9] | 1:29 |
| Sat 20.01.18 C13 | Storm Sanders / Marc Polmans | AUS | AUS | WC | 2-1 | Anna-Lena Groenefeld / Robert Farah |  GER | COL | | 7-5 | 1-6 | [4-10] | 1:07 |
| Fri 19.01.18 C19 | Maria Martinez Sanchez / Marcelo Demoliner | ESP | BRA | | 2-0 | Nicole Melichar / Nicholas Monroe | USA | USA | | 6-2 | 6-3 | | 0:54 |
| Sun 21.01.18 C3 | Hao-Ching Chan / Michael Venus | TPE | NZL | | 2-0 | Zhaoxuan Yang / Aisam Ul-Haq Qureshi |  CHN |  PAK | | 6-3 | 6-4 | | 0:57 |
| Sun 21.01.18 C8 | Kveta Peschke / Henri Kontinen | CZE | FIN | | 2-0 | Zoe Hives / Bradley Mousley | AUS | AUS | | 6-4 | 6-1 | | 0:46 |
| Sun 21.01.18 C8 | Abigail Spears / Juan Sebastian Cabal | USA | COL | | 2-1 | Renata Voracova / Fabrice Martin | CZE | FRA | | 6-4 | 6-74 | [10-6] | 1:29 |
| Fri 19.01.18 C13 | Vania King / Franko Skugor | USA | CRO | | 2-1 | Anastasia Rodionova / John-Patrick Smith | AUS | AUS | WC | 4-6 | 7-5 | [10-7] | 1:34 |
| Sun 21.01.18 MC | Timea Babos / Rohan Bopanna | HUN | IND | | 2-0 | Ellen Perez / Andrew Whittington | AUS | AUS | | 6-2 | 6-4 | | 0:55 |
| Bottom half |
| Sat 20.01.18 C7 | Andrea Hlavackova / Edouard Roger-Vasselin | CZE | FRA | | 2-0 | Shuai Peng / Max Mirnyi | CHN |  BLR | | 6-4 | 6-4 | | 1:13 |
| Sun 21.01.18 C3 | Nadiya Kichenok / Marcel Granollers | UKR | ESP | | 2-1 | Olga Savchuk / Artem Sitak | UKR | NZL | Alt | 7-65 | 3-6 | [10-7] | 1:24 |
| Fri 19.01.18 C3 | Samantha Stosur / Sam Groth | AUS | AUS | | 2-0 | Priscilla Hon / Matt Reid | AUS | AUS | | 6-3 | 7-63 | | 1:09 |
| Sun 21.01.18 C3 | Ekaterina Makarova / Bruno Soares | RUS | BRA | | 2-1 | Yifan Xu / Marcus Daniell | CHN | NZL | | 6-3 | 5-7 | [10-2] | 1:19 |
| Sat 20.01.18 C7 | Gabriela Dabrowski / Mate Pavic | CAN | CRO | 8 | 0-0 | Lizette Cabrera / Alex Bolt | AUS | AUS | WC | 6-3 | 7-5 | | 1:00 |
| Sun 21.01.18 Hi | Demi Schuurs / Jean-Julien Rojer | NED | NED | | 2-0 | Monique Adamczak / Matthew Ebden | AUS | AUS | | 7-5 | 6-4 | | 1:17 |
| Fri 19.01.18 C19 | Johanna Larsson / Matwe Middelkoop | SWE | NED | | 2-0 | Alicja Rosolska / Santiago Gonzalez |  POL |  MEX | | 6-2 | 7-5 | | 1:00 |
| Sun 21.01.18 C2 | Casey Dellacqua / John Peers | AUS | AUS | | 2-0 | Arantxa Parra Santonja / Marc Lopez | ESP | ESP | | 6-4 | 6-4 | | 1:02 |
