2023 Koblenz Open
The 2023 Koblenz Open powered by Montabaur was a professional tennis tournament played on indoor hard courts. It was the fifth edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Koblenz, Germany from 30 January to 5 February 2023.
Singles main-draw entrants
Seeds
- 1 Rankings are as of 16 January 2023.
Other entrants
The following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
- Johannes Härteis
- Antoine Hoang
- Mats Rosenkranz
- Vitaliy Sachko
- Alexey Vatutin
- Denis Yevseyev
Champions
Singles
- Roman Safiullin def. Vasek Pospisil 6–2, 7–5.
Doubles
- Fabian Fallert / Hendrik Jebens def. Jonathan Eysseric / Denys Molchanov 7–6, 6–3.