2023 Upper Austria Open

The 2023 Upper Austria Open was a professional tennis tournament played on clay courts. It was the second edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Mauthausen, Austria between 8 and 14 May 2023.

Seeds

 * 1 Rankings as of 24 April 2023.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇦🇹 Sandro Kopp
 * 🇦🇹 Gerald Melzer
 * 🇦🇹 Lukas Neumayer

The following players received entry into the singles main draw as alternates:
 * 🇫🇷 Manuel Guinard
 * 🇧🇬 Alexandar Lazarov
 * 🇦🇺 James McCabe
 * 🇩🇪 Louis Wessels

The following players received entry from the qualifying draw:
 * 🇧🇦 Mirza Bašić
 * 🇷🇴 Marius Copil
 * 🇩🇪 Lucas Gerch
 * 🇩🇪 Hendrik Jebens
 * 🇦🇹 Matthias Ujvary
 * Damien Wenger

Singles

 * 🇷🇸 Hamad Međedović def. 🇦🇹 Filip Misolic 6–2, 6–7(5–7), 6–4.

Doubles

 * Romain Arneodo / 🇦🇹 Sam Weissborn def. 🇩🇪 Constantin Frantzen / 🇩🇪 Hendrik Jebens 6–4, 6–2.