2023 Tennis Open Karlsruhe – Singles

This was the first edition of the tournament.

Alejandro Tabilo won the title after Giulio Zeppieri retired leading 6–2, 0–1 in the final.

Seeds
• # 🇭🇺 Zsombor Piros (semifinals)

• # Pavel Kotov (second round)

• # 🇪🇸 Pedro Martínez (second round)

• # 🇮🇹 Giulio Zeppieri (final, retired)

• # 🇧🇷 Thiago Seyboth Wild (quarterfinals)

• # 🇰🇿 Timofey Skatov (semifinals)

• # Ivan Gakhov (quarterfinals)

• # Alejandro Tabilo (champion)