2018 Båstad Challenger – Singles

Dušan Lajović was the defending champion but chose not to defend his title.

Pedro Martínez won the title after defeating Corentin Moutet 7–6(7–5), 6–4 in the final.

Seeds
• # 🇦🇷 Guido Andreozzi (second round)

• # 🇸🇪 Elias Ymer (first round)

• # 🇫🇷 Corentin Moutet (final)

• # 🇧🇷 Thiago Monteiro (second round)

• # Henri Laaksonen (first round)

• # 🇫🇷 Calvin Hemery (second round)

• # 🇨🇦 Félix Auger-Aliassime (first round, retired)

• # 🇩🇪 Oscar Otte (first round)