| 2026 Koblenz Open | |
|---|---|
| Date | 2 – 8 February |
| Edition | 8th |
| Surface | Hard (indoor) |
| Location | Koblenz, Germany |
| 2025 Champions | |
| Singles | |
 Ugo Blanchet | |
| Champions | |
| Doubles | |
 Tibo Colson /  Thijmen Loof | |
The 2026 Koblenz Open was a professional tennis tournament played on indoor hardcourts. It was the eighth edition of the tournament which was part of the 2026 ATP Challenger Tour. It took place in Koblenz, Germany from 2 to 8 February 2026.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 CZE | Zdeněk Kolář | 176 | 1 |
| FRA | Dan Added | 201 | 2 |
 GBR | Johannus Monday | 216 | 3 |
 JPN | Kaichi Uchida | 248 | 4 |
 GER | Henri Squire | 276 | 5 |
| GER | Patrick Zahraj | 280 | 6 |
| GER | Tom Gentzsch | 283 | 7 |
| BEL | Michael Geerts | 293 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw through the Next Gen Accelerator programme:
Maé MaligeThe following players received entry from the qualifying draw:
Matthew William Donald Buvaysar Gadamauri Liam Gavrielides
Johan Nikles Mika Petkovic Max Hans Rehberg 
Pavel Kotov vs. Tom Gentzsch Tibo Colson / Thijmen Loof def. Filip Duda / 
Stefan Latinović 7–6(7–1), 3–6, [10–6].