2023 Poznań Open – Singles

Arthur Rinderknech was the defending champion but chose not to defend his title.

Mariano Navone won the title after defeating Tomás Barrios Vera 7–5, 6–3 in the final.

Seeds
• # Alexander Shevchenko (first round)

• # 🇦🇷 Federico Coria (first round)

• # 🇨🇿 Tomáš Macháč (first round)

• # 🇦🇷 Facundo Díaz Acosta (quarterfinals)

• # Tomás Barrios Vera (final)

• # 🇫🇷 Geoffrey Blancaneaux (first round, retired)

• # 🇧🇦 Damir Džumhur (first round)

• # 🇨🇿 Dalibor Svrčina (first round)