# 2025 Koblenz Open – Singles

Jurij Rodionov was the defending champion but chose not to defend his title.
Ugo Blanchet won the title after defeating Luca Nardi 6–3, 3–6, 7–6$^{(7–5)}$ in the final.

## Seeds

* Henri Squire (quarterfinals)
* Gijs Brouwer (withdrew)
* Antoine Escoffier (first round)
* Matteo Martineau (quarterfinals)
* Ugo Blanchet (champion)
* Gianluca Mager (first round)
* Federico Arnaboldi (first round)
* Francesco Maestrelli (withdrew)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| | Giulio Zeppieri | 4 | 6$^4$ | | | | | |
| Q | Luca Nardi | 6 | 7$^7$ | | | | | |
| Q | Luca Nardi | 6 | 7$^7$ | Q | Luca Nardi | 3 | 6 | 6$^5$ |
| | | | | 5 | Ugo Blanchet | 6 | 3 | 7$^7$ |
| 5 | Ugo Blanchet | 7$^8$ | 6 | 5 | Ugo Blanchet | 6 | 3 | 7$^7$ |
| LL | Jakub Paul | 6$^6$ | 4 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | H Squire | 3 | 6 | 6 | | | | | | | | | | | | | | |
| LL | D Kuzmanov | 6 | 4 | 3 | 1 | H Squire | 6 | 6 | | | | | | | | | | |
| Q | Max Wiskandt | 6$^5$ | 4 | | | A Shelbayh | 3 | 2 | | | | | | | | | | |
| | A Shelbayh | 7$^7$ | 6 | | | | | | | 1 | H Squire | 6 | 6$^7$ | 3 | | | | |
| Q | Vadym Ursu | 6$^5$ | 3 | | | | | | | | G Zeppieri | 4 | 7$^9$ | 6 | | | | |
| | Mathys Erhard | 7$^7$ | 6 | | | M Erhard | 3 | 6 | 3 | | | | | | | | | |
| | G Zeppieri | 6 | 6 | | | G Zeppieri | 6 | 1 | 6 | | | | | | | | | |
| 7 | F Arnaboldi | 4 | 2 | | | | | | | | | | | | | G Zeppieri | 4 | 6$^4$ |
| 3 | A Escoffier | 1 | 6 | 3 | | | | | | | | | | | Q | L Nardi | 6 | 7$^7$ |
| | G Blancaneaux | 6 | 3 | 6 | | G Blancaneaux | 2 | 2 | | | | | | | | | | |
| | J Sels | 3 | 4 | | Q | L Nardi | 6 | 6 | | | | | | | | | | |
| Q | L Nardi | 6 | 6 | | | | | | | Q | L Nardi | 6 | 7 | | | | | |
| WC | J Engel | 2 | 2 | | | | | | | Q | M Brunold | 4 | 5 | | | | | |
| Q | M Brunold | 6 | 6 | | Q | M Brunold | 6 | 6 | | | | | | | | | | |
| Q | C Negritu | 4 | 6 | 7 | Q | C Negritu | 2 | 4 | | | | | | | | | | |
| LL | Ryan Nijboer | 6 | 2 | 5 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | U Blanchet | 4 | 6 | 6 | | | | | | | | | | | | | | |
| | M Geerts | 6 | 1 | 4 | 5 | U Blanchet | 2 | 7$^7$ | 7$^7$ | | | | | | | | | |
| | MH Rehberg | 6 | 6 | | | MH Rehberg | 6 | 6$^5$ | 6$^4$ | | | | | | | | | |
| Alt | O Prihodko | 4 | 4 | | | | | | | 5 | U Blanchet | 7$^7$ | 3 | 7$^7$ | | | | |
| WC | Diego Dedura-Palomero | 6$^7$ | 1 | | | | | | | 4 | M Martineau | 6$^3$ | 6 | 6$^1$ | | | | |
| Q | Florian Broska | 7$^9$ | 6 | | Q | F Broska | 4 | 7 | 4 | | | | | | | | | |
| | B Zapata Miralles | 2 | 6$^5$ | | 4 | M Martineau | 6 | 5 | 6 | | | | | | | | | |
| 4 | M Martineau | 6 | 7$^7$ | | | | | | | | | | | | 5 | U Blanchet | 7$^8$ | 6 |
| 6 | G Mager | 4 | 2 | | | | | | | | | | | | LL | J Paul | 6$^6$ | 4 |
| Alt | A Vatutin | 6 | 6 | | Alt | A Vatutin | 4 | 6 | 6 | | | | | | | | | |
| Alt | I Gakhov | 6 | 3 | 6 | Alt | I Gakhov | 6 | 2 | 4 | | | | | | | | | |
| WC | M Schönhaus | 2 | 6 | 3 | | | | | | Alt | A Vatutin | 3 | 6 | 3 | | | | |
| | Samuel Vincent Ruggeri | 4 | 1 | | | | | | | LL | J Paul | 6 | 2 | 6 | | | | |
| | D Masur | 6 | 6 | | | D Masur | 6$^4$ | 5 | | | | | | | | | | |
| | R Molleker | 4 | 6$^2$ | | LL | J Paul | 7$^7$ | 7 | | | | | | | | | | |
| LL | J Paul | 6 | 7$^7$ | | | | | | | | | | | | | | | |