2023 Sardegna Open – Singles

Lorenzo Sonego was the defending champion but chose not to defend his title.

Ugo Humbert won the title after defeating Laslo Djere 4–6, 7–5, 6–4 in the final.

Seeds
The top four seeds received a bye into the second round. • # 🇯🇵 Yoshihito Nishioka (second round)

• # 🇺🇸 Ben Shelton (semifinals)

• # 🇺🇸 Mackenzie McDonald (second round)

• # 🇷🇸 Laslo Djere (final)

• # 🇦🇷 Diego Schwartzman (first round)

• # 🇫🇷 Ugo Humbert (champion)

• # 🇮🇹 Marco Cecchinato (withdrew)

• # 🇧🇷 Thiago Monteiro (first round, retired)