| Singles | |
|---|---|
| 2025 Koblenz Open | |
| Champion |  Ugo Blanchet |
| Runner-up |  Luca Nardi |
| Score | 6–3, 3–6, 7–6(7–5) |
Jurij Rodionov was the defending champion [1] 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. [2]
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)| Semifinals | Final | ||||||||||||
| Giulio Zeppieri | 4 | 64 | |||||||||||
| Q | Luca Nardi | 6 | 77 | ||||||||||
| Q | Luca Nardi | 3 | 6 | 65 | |||||||||
| 5 | Ugo Blanchet | 6 | 3 | 77 | |||||||||
| 5 | Ugo Blanchet | 78 | 6 | ||||||||||
| LL |  Jakub Paul | 66 | 4 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | H Squire | 3 | 6 | 6 | |||||||||||||||||||||||
| LL |  D Kuzmanov | 6 | 4 | 3 | 1 | H Squire | 6 | 6 | |||||||||||||||||||
| Q | Max Wiskandt | 65 | 4 |  A Shelbayh | 3 | 2 | |||||||||||||||||||||
| A Shelbayh | 77 | 6 | 1 | H Squire | 6 | 67 | 3 | ||||||||||||||||||||
| Q |  Vadym Ursu | 65 | 3 | G Zeppieri | 4 | 79 | 6 | ||||||||||||||||||||
| Mathys Erhard | 77 | 6 | M Erhard | 3 | 6 | 3 | |||||||||||||||||||||
| G Zeppieri | 6 | 6 | G Zeppieri | 6 | 1 | 6 | |||||||||||||||||||||
| 7 | F Arnaboldi | 4 | 2 | G Zeppieri | 4 | 64 | |||||||||||||||||||||
| 3 | A Escoffier | 1 | 6 | 3 | Q | L Nardi | 6 | 77 | |||||||||||||||||||
| 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 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | U Blanchet | 4 | 6 | 6 | |||||||||||||||||||||||
 M Geerts | 6 | 1 | 4 | 5 | U Blanchet | 2 | 77 | 77 | |||||||||||||||||||
| MH Rehberg | 6 | 6 | MH Rehberg | 6 | 65 | 64 | |||||||||||||||||||||
| Alt | O Prihodko | 4 | 4 | 5 | U Blanchet | 77 | 3 | 77 | |||||||||||||||||||
| WC | Diego Dedura-Palomero | 67 | 1 | 4 | M Martineau | 63 | 6 | 61 | |||||||||||||||||||
| Q | Florian Broska | 79 | 6 | Q | F Broska | 4 | 7 | 4 | |||||||||||||||||||
 B Zapata Miralles | 2 | 65 | 4 | M Martineau | 6 | 5 | 6 | ||||||||||||||||||||
| 4 | M Martineau | 6 | 77 | 5 | U Blanchet | 78 | 6 | ||||||||||||||||||||
| 6 | G Mager | 4 | 2 | LL | J Paul | 66 | 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 | 64 | 5 | ||||||||||||||||||||||
| R Molleker | 4 | 62 | LL | J Paul | 77 | 7 | |||||||||||||||||||||
| LL | J Paul | 6 | 77 | ||||||||||||||||||||||||
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