| Doubles | |
|---|---|
| 2025 Koblenz Open | |
| Champions |  Jakub Paul  David Pel |
| Runners-up |  Geoffrey Blancaneaux  Joshua Paris |
| Score | Walkover |
Sander Arends and Sem Verbeek were the defending champions [1] but chose not to defend their title.
Jakub Paul and David Pel won the title via walkover after Geoffrey Blancaneaux and Joshua Paris withdrew before the final. [2]
Reese Stalder / Marcus Willis (first round)
Marco Bortolotti / 
Luis David Martínez (quarterfinals) Vasil Kirkov / Mick Veldheer (quarterfinals) Patrik Trhac / 
Szymon Walków (quarterfinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | R Stalder M Willis | 3 | 4 | ||||||||||||||||||||||||
 A Jecan  I Liutarevich | 6 | 6 | A Jecan I Liutarevich | 4 | 4 | ||||||||||||||||||||||
 C Negritu  D Vega Hernández | 3 | 4 | G Blancaneaux J Paris | 6 | 6 | ||||||||||||||||||||||
| G Blancaneaux J Paris | 6 | 6 | G Blancaneaux J Paris | 77 | 6 | ||||||||||||||||||||||
| 4 | P Trhac S Walków | 6 | 5 | [10] | WC | T Rühl P Zahraj | 65 | 1 | |||||||||||||||||||
| WC | D Masur M Schönhaus | 3 | 7 | [8] | 4 | P Trhac S Walków | 78 | 3 | [12] | ||||||||||||||||||
| Samuel Vincent Ruggeri Augusto Virgili | 6 | 4 | [4] | WC | T Rühl P Zahraj | 66 | 6 | [14] | |||||||||||||||||||
| WC | Tim Rühl Patrick Zahraj | 4 | 6 | [10] | G Blancaneaux J Paris | ||||||||||||||||||||||
| A Escoffier L Sanchez | 3 | 3 | J Paul D Pel | w/o | |||||||||||||||||||||||
| J Paul D Pel | 6 | 6 | J Paul D Pel | 78 | 7 | ||||||||||||||||||||||
| U Blanchet M Martineau | 5 | 6 | [10] | 3 | V Kirkov M Veldheer | 66 | 5 | ||||||||||||||||||||
| 3 | V Kirkov M Veldheer | 7 | 4 | [12] | J Paul D Pel | 6 | 6 | ||||||||||||||||||||
 D Molchanov  M Vrbenský | 77 | 6 | D Molchanov M Vrbenský | 3 | 2 | ||||||||||||||||||||||
| Jiří Barnat Filip Duda | 64 | 3 | D Molchanov M Vrbenský | 4 | 6 | [10] | |||||||||||||||||||||
Bruno Pujol Navarro K Uchida | 5 | 1 | 2 | M Bortolotti LD Martínez | 6 | 3 | [8] | ||||||||||||||||||||
| 2 | M Bortolotti LD Martínez | 7 | 6 | ||||||||||||||||||||||||
Jonathan Eysseric and André Ghem were the defending champions but chose not to defend their title.
Marin and Tomislav Draganja were the defending champions but only Tomislav chose to defend his title, partnering Nikola Čačić. Tomislav Draganja lost in the quarterfinals to Rameez Junaid and David Pel.
Aliaksandr Bury and Lloyd Harris were the defending champions but chose not to defend their title.
Rameez Junaid and David Pel were the defending champions, but only Junaid chose to defend his title, partnering Jozef Kovalík. Junaid lost in the quarterfinals to Andre Begemann and Fabrice Martin.
Markus Eriksson and André Göransson were the defending champions but only Eriksson chose to defend his title, partnering Tuna Altuna. Eriksson lost in the quarterfinals to Sander Arends and David Pel.
In the doubles of the 2019 Meerbusch Challenger tennis competition, David Pérez Sanz and Mark Vervoort were the defending champions but only Vervoort chose to defend his title, partnering Íñigo Cervantes. Vervoort lost in the first round to Sander Arends and David Pel.
Zdeněk Kolář and Adam Pavlásek were the defending champions but chose not to defend their title.
Philipp Oswald and Filip Polášek were the defending champions but chose not to defend their title.
Nicolas Mahut and Vasek Pospisil were the defending champions, but they chose not to participate.
Sander Gillé and Joran Vliegen were the reigning champions from when the tournament was last held in 2019, but chose not to defend their title.
Sander Arends and David Pel were the defending champions but chose not to defend their title.
Harri Heliövaara and Emil Ruusuvuori were the defending champions but chose not to defend their title.
Ruben Bemelmans and Daniel Masur were the reigning champions but only Bemelmans chose to defend his title, partnering Jonathan Eysseric. Bemelmans lost in the first round to Jonáš Forejtek and Michael Vrbenský.
Martín and Pablo Cuevas were the defending champions but only Martín Cuevas chose to defend his title, partnering Luis David Martínez. Cuevas lost in the semifinals to Sander Arends and David Pel.
Ivan and Matej Sabanov were the defending champions but chose not to defend their title.
Jonathan Eysseric and Quentin Halys were the defending champions but chose not to defend their title.
Sadio Doumbia and Fabien Reboul were the defending champions but lost in the semifinals to Filip Bergevi and Petros Tsitsipas.
Sander Arends and David Pel were the defending champions but chose not to defend their title.
Sander Arends and David Pel were the defending champions but only Arends chose to defend his title, partnering Grégoire Jacq. Arends successfully defended his title after he and Jacq defeated Antoine Escoffier and Joshua Paris 6–4, 6–2 in the final.
Jurij Rodionov was the defending champion but chose not to defend his title.