2023 Open de Rennes – Singles

Ugo Humbert was the defending champion but chose not to defend his title.

Maxime Cressy won the title after Benjamin Bonzi retired trailing 3–6, 0–2 in the final.

Seeds
• # 🇫🇷 Richard Gasquet (quarterfinals)

• # 🇫🇷 Grégoire Barrère (semifinals)

• # 🇫🇷 Quentin Halys (first round)

• # 🇫🇷 Corentin Moutet (second round)

• # 🇫🇷 Constant Lestienne (first round)

• # 🇲🇩 Radu Albot (quarterfinals)

• # 🇬🇧 Liam Broady (first round)

• # 🇫🇷 Benjamin Bonzi (final, retired)