2021 Città di Forlì III – Singles

Maxime Cressy was the defending champion but lost in the quarterfinals to Vitaliy Sachko.

Pavel Kotov won the title after defeating Andrea Arnaboldi 6–4, 6–3 in the final.

Seeds
• # 🇺🇸 Maxime Cressy (quarterfinals)

• # 🇮🇹 Federico Gaio (first round)

• # 🇮🇹 Salvatore Caruso (first round)

• # 🇧🇪 Zizou Bergs (first round)

• # 🇧🇦 Mirza Bašić (quarterfinals)

• # 🇺🇦 Vitaliy Sachko (semifinals, retired)

• # 🇮🇹 Andrea Vavassori (first round)

• # 🇮🇹 Andrea Arnaboldi (final)