| Doubles | |
|---|---|
| 2017 Sparkassen ATP Challenger | |
| Champions |  Sander Arends  Antonio Šančić |
| Runners-up |  Jeremy Jahn Edan Leshem |
| Final score | 6–2, 5–7, [13–11] |
Kevin Krawietz and Albano Olivetti were the defending champions but lost in the first round to Tomasz Bednarek and David Pel.
Sander Arends and Antonio Šančić won the title after defeating Jeremy Jahn and Edan Leshem 6–2, 5–7, [13–11] in the final.
Sander Arends / Antonio Šančić (champions)
Johan Brunström / 
Igor Zelenay (first round) Kevin Krawietz / 
Albano Olivetti (first round) Alexander Satschko / 
Tristan-Samuel Weissborn (semifinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | S Arends A Šančić | 77 | 78 | ||||||||||||||||||||||||
 P Martínez D Vega Hernández | 62 | 66 | 1 | S Arends A Šančić | w/o | ||||||||||||||||||||||
| WC | N Gombos L Klein | 7 | 6 | WC | N Gombos L Klein | ||||||||||||||||||||||
| T Lamasine H Nys | 5 | 3 | 1 | S Arends A Šančić | 5 | 6 | [10] | ||||||||||||||||||||
| 4 | A Satschko T-S Weissborn | 6 | 7 | 4 | A Satschko T-S Weissborn | 7 | 4 | [3] | |||||||||||||||||||
| WC |  Jonas Ciechi Erwin Tröbinger | 2 | 5 | 4 | A Satschko T-S Weissborn | 64 | 6 | [10] | |||||||||||||||||||
 L Grigelis  R Junaid | 64 | 3 | S Caruso F Gaio | 77 | 4 | [8] | |||||||||||||||||||||
| S Caruso F Gaio | 77 | 6 | 1 | S Arends A Šančić | 6 | 5 | [13] | ||||||||||||||||||||
 S Clayton J O'Mara | 77 | 77 | J Jahn E Leshem | 2 | 7 | [11] | |||||||||||||||||||||
| D Brown T Pütz | 61 | 65 | S Clayton J O'Mara | 7 | 77 | ||||||||||||||||||||||
 T Bednarek D Pel | 3 | 77 | [10] | T Bednarek D Pel | 5 | 65 | |||||||||||||||||||||
| 3 | K Krawietz A Olivetti | 6 | 62 | [5] | S Clayton J O'Mara | 64 | 7 | [11] | |||||||||||||||||||
| Jeremy Jahn E Leshem | 6 | 77 | J Jahn E Leshem | 77 | 5 | [13] | |||||||||||||||||||||
| WC | Michael Kerschbaumer Patric Prinoth | 3 | 64 | J Jahn E Leshem | 2 | 6 | [10] | ||||||||||||||||||||
| PR | S Robert I Sijsling | 3 | 6 | [10] | PR | S Robert I Sijsling | 6 | 3 | [7] | ||||||||||||||||||
| 2 | J Brunström I Zelenay | 6 | 3 | [6] | |||||||||||||||||||||||
Flavio Cipolla and Dominik Meffert were the defending champions, but chose not to participate.
Divij Sharan and Ken Skupski were the defending champions but chose not to defend their title.
Maximilian Neuchrist and Tristan-Samuel Weissborn were the defending champions but chose not to defend their title.
Tristan Lamasine and Albano Olivetti were the defending champions but only Olivetti chose to defend his title, partnering Kevin Krawietz. Olivetti lost in the first round to Ken and Neal Skupski.
Pierre-Hugues Herbert and Albano Olivetti were the defending champions but only Olivetti chose to defend his title, partnering Kevin Krawietz. Olivetti lost in the first round to Roman Jebavý and Igor Zelenay.
Players and pairs who neither have high enough rankings nor receive wild cards may participate in a qualifying tournament held one week before the annual Wimbledon Tennis Championships.
Mikhail Elgin and Andrei Vasilevski were the defending champions but chose not to defend their title.
Roman Jebavý and Andrej Martin were the defending champions but chose not to defend their title.
Kevin Krawietz and Albano Olivetti were the defending champions but lost in the first round to Aliaksandr Bury and Andreas Siljeström.
Hans Podlipnik-Castillo and Andrei Vasilevski were the defending champions but chose not to defend their title.
Sander Arends and Antonio Šančić were the defending champions but only Šančić chose to defend his title, partnering Purav Raja. Šančić lost in the finals to Sander Gillé and Joran Vliegen.
Sander Gillé and Joran Vliegen were the defending champions but chose not to defend their title.
Sander Gillé and Joran Vliegen were the defending champions but chose not to defend their title.
Sander Arends and Tristan-Samuel Weissborn were the defending champions but only Weissborn chose to defend his title, partnering Antonio Šančić. Weissborn successfully defended his title after defeating Teymuraz Gabashvili and Lukáš Lacko 7–5, 6–7(5–7), [10–7] in the final.
Pierre-Hugues Herbert and Arthur Rinderknech were the defending champions but chose to defend their title with different partners. Herbert partnered Albano Olivetti but lost in the quarterfinals to André Göransson and Gonçalo Oliveira. Rinderknech partnered Denys Molchanov but lost in the quarterfinals to Sander Arends and David Pel.
Kevin Krawietz and Andreas Mies were the defending champions and successfully defended their title, defeating Mate Pavić and Bruno Soares in the final, 6–3, 7–5.
Grégoire Barrère and Albano Olivetti were the defending champions but lost in the first round to Ruben Bemelmans and Daniel Masur.
Nicolas Mahut and Pierre-Hugues Herbert defeated Alexander Bublik and Andrey Golubev in the final, 4–6, 7–6(7–1), 6–4, to win the men's doubles title at the 2021 French Open. It was their second French Open title and fifth major title together. They saved match points in their semifinal match against Juan Sebastián Cabal and Robert Farah. Bublik and Golubev became the first male Kazakhstani players to reach a major final.
Andre Begemann and Albano Olivetti were the defending champions but chose not to defend their title.
Ruben Bemelmans and Daniel Masur were the defending champions but only Bemelmans chose to defend his title, partnering Jonathan Eysseric. Bemelmans lost in the first round to Jonáš Forejtek and Michael Vrbenský.