2023 Sibiu Open – Singles

Nerman Fatić was the defending champion and successfully defended his title after defeating Damir Džumhur 6–2, 6–4 in the final.

Seeds
• # 🇭🇺 Zsombor Piros (semifinals)

• # 🇮🇹 Flavio Cobolli (semifinals)

• # 🇧🇦 Damir Džumhur (final)

• # Ivan Gakhov (quarterfinals)

• # 🇮🇹 Stefano Travaglia (quarterfinals)

• # Duje Ajduković (quarterfinals)

• # 🇮🇹 Alessandro Giannessi (first round, retired)

• # 🇧🇦 Nerman Fatić (champion)