Ivan Dodig and Marcel Granollers were the defending champions, but chose not to participate together. Dodig was scheduled to play alongside Ben McLachlan, but withdrew with a back injury. Granollers teamed up with Rohan Bopanna, but lost in the quarterfinals to Dominic Inglot and Franko Škugor.
| Doubles | |
|---|---|
| 2018 Swiss Indoors | |
| Champions |  Dominic Inglot Franko Škugor |
| Runners-up |  Alexander Zverev Mischa Zverev |
| Score | 6–2, 7–5 |
| Draw | 16 |
| Seeds | 4 |
Inglot and Škugor went on to win the title, defeating Alexander and Mischa Zverev in the final 6–2, 7–5.
Seeds
Raven Klaasen / 
Michael Venus (first round)
Ivan Dodig / 
Ben McLachlan (withdrew)
Jean-Julien Rojer / 
Horia Tecău (quarterfinals)
Rohan Bopanna / 
Marcel Granollers (quarterfinals)
Draw
Key
- 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
| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 |  R Klaasen  M Venus | 5 | 7 | [5] | |||||||||||||||||||||||
| WC |  M-A Hüsler  S Verbeek | 7 | 5 | [10] | WC | M-A Hüsler S Verbeek | 6 | 68 | [5] | ||||||||||||||||||
 D Sharan A Sitak | 6 | 63 | [10] | D Sharan A Sitak | 1 | 710 | [10] | ||||||||||||||||||||
 M Ebden  D Medvedev | 4 | 77 | [7] | D Sharan A Sitak | 1 | 3 | |||||||||||||||||||||
| 3 | J-J Rojer  H Tecău | 6 | 6 | A Zverev M Zverev | 6 | 6 | |||||||||||||||||||||
| R Haase M Middelkoop | 3 | 4 | 3 | J-J Rojer H Tecău | 4 | 4 | |||||||||||||||||||||
| A Zverev M Zverev | 4 | 77 | [10] | A Zverev M Zverev | 6 | 6 | |||||||||||||||||||||
 N Monroe J Sock | 6 | 62 | [4] | A Zverev M Zverev | 2 | 5 | |||||||||||||||||||||
 M Cecchinato A Seppi | 3 | 4 | D Inglot F Škugor | 6 | 7 | ||||||||||||||||||||||
| D Inglot F Škugor | 6 | 6 | D Inglot F Škugor | 2 | 78 | [10] | |||||||||||||||||||||
| Q |  G García López D Marrero | 1 | 4 | 4 | R Bopanna M Granollers | 6 | 66 | [3] | |||||||||||||||||||
| 4 | R Bopanna M Granollers | 6 | 6 | D Inglot F Škugor | 5 | 6 | [10] | ||||||||||||||||||||
| WC | H Laaksonen L Margaroli | 77 | 3 | [5] |  J Peralta  H Zeballos | 7 | 3 | [6] | |||||||||||||||||||
| J Peralta H Zeballos | 64 | 6 | [10] | J Peralta H Zeballos | 7 | 6 | |||||||||||||||||||||
 A-u-H Qureshi  S Tsitsipas | 77 | 3 | [10] | A-u-H Qureshi S Tsitsipas | 5 | 3 | |||||||||||||||||||||
| LL |  R Lindstedt  F Martin | 64 | 6 | [6] | |||||||||||||||||||||||
Qualifying
Seeds
Robert Lindstedt / 
Fabrice Martin (qualifying competition, lucky losers)
Nicolás Jarry / 
Leonardo Mayer (first round)
Qualifiers
Lucky losers
Qualifying draw
| First round | Qualifying competition | ||||||||||||
| 1 | Robert Lindstedt Fabrice Martin | 6 | 6 | ||||||||||
| WC | Sandro Ehrat Jakub Paul | 3 | 1 | ||||||||||
| 1 | Robert Lindstedt Fabrice Martin | 3 | 6 | [7] | |||||||||
| Guillermo García López David Marrero | 6 | 4 | [10] | ||||||||||
| Guillermo García López David Marrero | 6 | 62 | [12] | ||||||||||
| 2 | Nicolás Jarry Leonardo Mayer | 4 | 77 | [10] | |||||||||
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