Latisha Chan and Martina Hingis were the defending champions, but Chan chose to compete in Birmingham and Hingis retired from professional tennis at the end of 2017.
| Doubles | |
|---|---|
| 2018 Mallorca Open | |
| Champions |  Andreja Klepač  María José Martínez Sánchez |
| Runners-up |  Lucie Šafářová Barbora Štefková |
| Score | 6–1, 3–6, [10–3] |
Andreja Klepač and María José Martínez Sánchez won the title, defeating Lucie Šafářová and Barbora Štefková in the final, 6–1, 3–6, [10–3].
Seeds edit
Andreja Klepač / 
María José Martínez Sánchez (champions)
Nadiia Kichenok / 
Anastasia Rodionova (quarterfinals)- Monique Adamczak /
Renata Voráčová (first round) 
Oksana Kalashnikova / 
Makoto Ninomiya (first round)
Draw edit
Key edit
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- SE = Special exempt
- PR = Protected ranking
- ITF = ITF entry
- JE = Junior exempt
- w/o = Walkover
- r = Retired
- d = Defaulted
- SR = Special ranking
Draw edit
| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | A Klepač MJ Martínez Sánchez
| 6 | 6 | ||||||||||||||||||||||||
| PR | A Medina Garrigues A Parra Santonja
| 4 | 2 | 1 | A Klepač MJ Martínez Sánchez
| 6 | 6 | ||||||||||||||||||||
 A Rosolska A Spears
| 7 | 5 | [12] | A Rosolska A Spears
| 3 | 1 | |||||||||||||||||||||
 J Moore G Olmos
| 5 | 7 | [10] | 1 | A Klepač MJ Martínez Sánchez
| 6 | 6 | ||||||||||||||||||||
| 4 |  O Kalashnikova M Ninomiya
| 4 | 2 |  X Knoll A Smith
| 4 | 4 | |||||||||||||||||||||
| X Knoll A Smith
| 6 | 6 | X Knoll A Smith
| 6 | 6 | ||||||||||||||||||||||
| WC |  S Cîrstea A Petkovic
| 6 | 6 | WC | S Cîrstea A Petkovic
| 4 | 4 | ||||||||||||||||||||
 D Jurak C Lister
| 1 | 4 | 1 | A Klepač MJ Martínez Sánchez
| 6 | 3 | [10] | ||||||||||||||||||||
| K Christian S Santamaria
| 6 | 6 | WC | L Šafářová B Štefková
| 1 | 6 | [3] | ||||||||||||||||||||
 V Azarenka S Kuznetsova
| 2 | 3 | K Christian S Santamaria
| 4 | 3 | ||||||||||||||||||||||
| WC | L Šafářová B Štefková
| 6 | 6 | WC | L Šafářová B Štefková
| 6 | 6 | ||||||||||||||||||||
| 3 | M Adamczak R Voráčová
| 3 | 3 | WC | L Šafářová B Štefková
| 6 | 6 | ||||||||||||||||||||
| V Kudermetova A Sabalenka
| 4 | 6 | [2] |  L Kerkhove L Marozava
| 0 | 4 | |||||||||||||||||||||
| L Kerkhove L Marozava
| 6 | 3 | [10] | L Kerkhove L Marozava
| 65 | 7 | [10] | ||||||||||||||||||||
D Collins S-w Hsieh
| 7 | 3 | [6] | 2 |  N Kichenok An Rodionova
| 77 | 5 | [5] | |||||||||||||||||||
| 2 | N Kichenok An Rodionova
| 5 | 6 | [10] | |||||||||||||||||||||||