1991 Volvo San Marino Open – Singles

In the first edition of the tournament, Katia Piccolini won the title by defeating Silvia Farina 6–2, 6–3 in the final.

Seeds
• # 🇮🇹 Raffaella Reggi (quarterfinals)

• # 🇮🇹 Katia Piccolini (champion)

• # 🇺🇸 Carrie Cunningham (quarterfinals)

• # Sabine Hack (quarterfinals)

• # 🇮🇹 Laura Garrone (second round)

• # 🇦🇷 Mercedes Paz (second round)

• # 🇦🇷 Cristina Tessi (second round)

• # 🇭🇺 Csilla Bartos (second round)