2018 Internationaux de Tennis de Blois – Singles

Damir Džumhur was the defending champion but chose not to defend his title.

Scott Griekspoor won the title after defeating Félix Auger-Aliassime 6–4, 6–4 in the final.

Seeds
• # Pedro Sousa (first round)

• # 🇫🇷 Calvin Hemery (withdrew)

• # Henri Laaksonen (second round)

• # 🇦🇷 Juan Ignacio Londero (quarterfinals)

• # 🇨🇦 Félix Auger-Aliassime (final)

• # 🇦🇷 Carlos Berlocq (second round)

• # 🇫🇷 Stéphane Robert (semifinals)

• # Christian Garín (quarterfinals)