2023 Generali Open Kitzbühel – Singles

Sebastián Báez defeated Dominic Thiem in the final, 6–3, 6–1 to win the singles tennis title at the 2023 Austrian Open Kitzbühel. It was his third ATP Tour singles title. It was Thiem's first appearance in an ATP Tour final since the 2020 ATP Finals. Thiem was the second consecutive wildcard to reach the final, after Filip Misolic the previous year.

Roberto Bautista Agut was the reigning champion, but withdrew before the tournament began.

Seeds
The top four seeds received a bye into the second round. • #🇦🇷 Tomás Martín Etcheverry (semifinals)

• #🇩🇪 Yannick Hanfmann (second round)

• #🇦🇷 Pedro Cachin (quarterfinals)

• #🇦🇹 Sebastian Ofner (second round)

• #🇷🇸 Laslo Djere (semifinals)

• #🇪🇸 Roberto Carballés Baena (second round)

• #🇷🇸 Dušan Lajović (first round)

• #🇩🇪 Daniel Altmaier (second round)

Seeds
• # 🇦🇷 Federico Coria (first round)

• # 🇦🇷 Juan Manuel Cerúndolo (qualifying competition, lucky loser)

• # 🇧🇷 Thiago Monteiro (qualifying competition)

• # 🇦🇷 Facundo Bagnis (qualified)

• # 🇷🇸 Hamad Medjedovic (qualified)

• # Ivan Gakhov (qualifying competition)

• # 🇦🇹 Dennis Novak (qualified)

• # Jesper de Jong (first round)

Qualifiers
• # 🇷🇸 Hamad Medjedovic

• # 🇦🇷 Guido Andreozzi

• # 🇦🇹 Dennis Novak

• # 🇦🇷 Facundo Bagnis

Lucky loser

 * 1) 🇦🇷 Juan Manuel Cerúndolo