2019 Internationaux de Tennis de Blois – Singles

Scott Griekspoor was the defending champion but lost in the second round to Tristan Lamasine.

Pedro Sousa won the title after defeating Kimmer Coppejans 4–6, 6–3, 7–6(7–4) in the final.

Seeds
All seeds receive a bye into the second round. • # Pedro Sousa (champion)

• # 🇪🇸 Pedro Martínez (third round)

• # 🇮🇹 Lorenzo Giustino (semifinals)

• # 🇧🇪 Kimmer Coppejans (final)

• # 🇦🇷 Carlos Berlocq (second round)

• # 🇨🇴 Daniel Elahi Galán (quarterfinals)

• # 🇫🇷 Maxime Janvier (withdrew)

• # 🇦🇷 Federico Coria (third round)

• # 🇦🇷 Facundo Argüello (semifinals)

• # 🇫🇷 Constant Lestienne (third round)

• # 🇫🇷 Mathias Bourgue (withdrew)

• # 🇦🇷 Pedro Cachin (third round)

• # 🇪🇸 Bernabé Zapata Miralles (third round)

• # 🇨🇦 Steven Diez (third round)

• # 🇯🇵 Kaichi Uchida (second round)

• # 🇫🇷 Johan Tatlot (quarterfinals)

• # 🇫🇷 Tristan Lamasine (quarterfinals)