2023 Kozerki Open – Singles

Tomáš Macháč was the defending champion but lost in the second round to Denis Yevseyev.

Jesper de Jong won the title after defeating Benjamin Hassan 6–3, 6–3 in the final.

Seeds
• # 🇨🇿 Tomáš Macháč (second round)

• # 🇧🇪 Joris De Loore (first round)

• # 🇨🇿 Zdeněk Kolář (withdrew)

• # 🇦🇺 Marc Polmans (second round)

• # Jesper de Jong (champion)

• # 🇸🇪 Elias Ymer (semifinals)

• # Jelle Sels (first round)

• # Frederico Ferreira Silva (first round)