2023 Tennis Open Karlsruhe

The 2023 Tennis Open Karlsruhe was a professional tennis tournament played on clay courts. It was the first edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Karlsruhe, Germany between 3 and 9 July 2023.

Seeds

 * 1 Rankings are as of 26 June 2023.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇩🇪 Liam Gavrielides
 * 🇩🇪 Henri Squire
 * 🇩🇪 Marko Topo

The following players received entry from the qualifying draw:
 * 🇺🇸 Dali Blanch
 * Hady Habib
 * 🇩🇪 Tim Handel
 * 🇪🇸 Oriol Roca Batalla
 * 🇦🇺 Akira Santillan
 * 🇰🇿 Denis Yevseyev

Singles

 * Alejandro Tabilo def. 🇮🇹 Giulio Zeppieri 2–6, 1–0 ret.

Doubles

 * 🇦🇹 Neil Oberleitner / 🇩🇪 Tim Sandkaulen def. 🇨🇿 Vít Kopřiva / Michail Pervolarakis 6–1, 6–1.