| Champ: |  Tommy Robredo |
| Runner: | Cristian Garín |
| Score: | 3–6, 6–3, 6–2 |
| Type: | singles doubles |
See main article: 2018 Lisboa Belém Open.
Oscar Otte was the defending champion but chose not to defend his title.
Tommy Robredo won the title after defeating Cristian Garín 3–6, 6–3, 6–2 in the final.