2023 Cassis Open Provence – Singles

Hugo Grenier was the defending champion but chose not to defend his title.

Mattia Bellucci won the title after defeating Tomáš Macháč 6–3, 6–4 in the final.

Seeds
• # 🇫🇷 Alexandre Müller (semifinals)

• # 🇬🇧 Liam Broady (semifinals)

• # 🇫🇷 Benjamin Bonzi (first round)

• # 🇨🇿 Tomáš Macháč (final)

• # 🇮🇹 Giulio Zeppieri (quarterfinals)

• # 🇫🇷 Antoine Escoffier (withdrew)

• # 🇮🇹 Mattia Bellucci (champion)

• # 🇮🇹 Federico Gaio (second round)