2023 Brest Challenger – Singles

Grégoire Barrère was the defending champion but chose not to defend his title.

Pedro Martínez won the title after defeating Benjamin Bonzi 7–6(8–6), 7–6(7–1) in the final.

Seeds
• # 🇫🇷 Richard Gasquet (first round)

• # Nuno Borges (second round)

• # 🇪🇸 Jaume Munar (first round)

• # 🇫🇷 Benjamin Bonzi (final)

• # 🇫🇷 Constant Lestienne (semifinals)

• # 🇫🇷 Hugo Gaston (semifinals)

• # 🇬🇧 Liam Broady (second round)

• # 🇧🇪 David Goffin (second round)