| Doubles | |
|---|---|
| 2018 Swiss Open Gstaad | |
| Champions |  Matteo Berrettini Daniele Bracciali |
| Runners-up |  Denys Molchanov  Igor Zelenay |
| Final score | 7–6(7–2), 7–6(7–5) |
Oliver Marach and Philipp Oswald were the defending champions, but they chose to compete alongside different partners in Hamburg instead.
Matteo Berrettini and Daniele Bracciali won the title, defeating Denys Molchanov and Igor Zelenay in the final, 7–6(7–2), 7–6(7–5).
Robin Haase / Matwé Middelkoop (semifinals)
Santiago González / 
João Sousa (semifinals)
Roman Jebavý / 
Andrés Molteni (first round) Sander Arends / 
Antonio Šančić (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | R Haase M Middelkoop | 5 | 6 | [12] | |||||||||||||||||||||||
 R Albot  A Vasilevski | 7 | 4 | [10] | 1 | R Haase M Middelkoop | 6 | 6 | ||||||||||||||||||||
| WC |  M-A Hüsler L Margaroli | 4 | 4 | WC | A Bodmer J Paul | 4 | 2 | ||||||||||||||||||||
| WC | A Bodmer J Paul | 6 | 6 | 1 | R Haase M Middelkoop | 63 | 77 | [7] | |||||||||||||||||||
| 4 | S Arends A Šančić | 4 | 5 | PR | M Berrettini D Bracciali | 77 | 65 | [10] | |||||||||||||||||||
| PR | M Berrettini D Bracciali | 6 | 7 | PR | M Berrettini D Bracciali | 6 | 6 | ||||||||||||||||||||
 K Krawietz A Mies | 64 | 4 |  J Eysseric H Nys | 4 | 3 | ||||||||||||||||||||||
| J Eysseric H Nys | 77 | 6 | PR | M Berrettini D Bracciali | 77 | 77 | |||||||||||||||||||||
 S Balaji V Vardhan | 79 | 3 | [9] | D Molchanov I Zelenay | 62 | 65 | |||||||||||||||||||||
| Alt | G Andreozzi  J Munar | 67 | 6 | [11] | Alt | G Andreozzi J Munar | 6 | 5 | [7] | ||||||||||||||||||
| D Molchanov I Zelenay | 6 | 3 | [10] | D Molchanov I Zelenay | 4 | 7 | [10] | ||||||||||||||||||||
| 3 | R Jebavý A Molteni | 3 | 6 | [8] | D Molchanov I Zelenay | 6 | 6 | ||||||||||||||||||||
 A Behar G García López | 4 | 3 | 2 | S González J Sousa | 4 | 4 | |||||||||||||||||||||
R Carballés Baena  T Daniel | 6 | 6 | R Carballés Baena T Daniel | 2 | 62 | ||||||||||||||||||||||
 A Krajicek J Nedunchezhiyan | 1 | 0 | 2 | S González J Sousa | 6 | 77 | |||||||||||||||||||||
| 2 | S González J Sousa | 6 | 6 | ||||||||||||||||||||||||
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