2023 San Marino Open – Singles

Pavel Kotov was the defending champion but chose not to defend his title.

Jaume Munar won the title after defeating Andrea Pellegrino 6–4, 6–1 in the final.

Seeds
• # 🇫🇷 Alexandre Müller (first round)

• # 🇪🇸 Jaume Munar (champion)

• # 🇧🇪 David Goffin (quarterfinals)

• # 🇮🇹 Fabio Fognini (quarterfinals)

• # 🇮🇹 Flavio Cobolli (first round)

• # 🇧🇪 Kimmer Coppejans (second round)

• # 🇨🇿 Zdeněk Kolář (first round)

• # 🇦🇺 Marc Polmans (first round)