The 2025 Koblenz Open was a professional tennis tournament played on indoor hardcourts.

It was the seventh edition of the tournament which was part of the 2025 ATP Challenger Tour.

It took place in Koblenz, Germany from 27 January to 2 February 2025.

The following players received wildcards into the singles main draw: The following players received entry into the singles main draw as alternates: The following players received entry from the qualifying draw: The following players received entry as lucky losers: