| Doubles | |
|---|---|
| 2021 Open d'Orléans | |
| Champions |  Pierre-Hugues Herbert Albano Olivetti |
| Runners-up | Antoine Hoang Kyrian Jacquet |
| Score | 6–2, 2–6, [11–9] |
Romain Arneodo and Hugo Nys were the defending champions [1] but only Arneodo chose to defend his title, partnering Quentin Halys. Arneodo lost in the quarterfinals to Antoine Hoang and Kyrian Jacquet.
Pierre-Hugues Herbert and Albano Olivetti won the title after defeating Hoang and Jacquet 6–2, 2–6, [11–9] in the final.
Pierre-Hugues Herbert / Albano Olivetti (champions)
Lloyd Glasspool / 
Harri Heliövaara (first round)
Nathaniel Lammons / 
David Pel (semifinals)
Denys Molchanov / 
Matt Reid (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | P-H Herbert A Olivetti | 6 | 6 | ||||||||||||||||||||||||
 I Sabanov M Sabanov | 4 | 4 | 1 | P-H Herbert A Olivetti | 6 | 6 | |||||||||||||||||||||
| WC | G Barrère J Eysseric | 3 | 62 |  A Begemann  I Zelenay | 3 | 4 | |||||||||||||||||||||
| A Begemann I Zelenay | 6 | 77 | 1 | P-H Herbert A Olivetti | 77 | 66 | [10] | ||||||||||||||||||||
| 3 | N Lammons D Pel | 6 | 6 | 3 | N Lammons D Pel | 64 | 78 | [4] | |||||||||||||||||||
 A Tabilo  F Verdasco | 4 | 4 | 3 | N Lammons D Pel | 7 | 77 | |||||||||||||||||||||
 S Walków J Zieliński | 6 | 6 | S Walków J Zieliński | 5 | 65 | ||||||||||||||||||||||
| WC | A Fils G Mpetshi Perricard | 3 | 4 | 1 | P-H Herbert A Olivetti | 6 | 2 | [11] | |||||||||||||||||||
| K Drzewiecki S Martos Gornés | 66 | 65 | WC | A Hoang K Jacquet | 2 | 6 | [9] | ||||||||||||||||||||
| WC | A Hoang K Jacquet | 78 | 77 | WC | A Hoang K Jacquet | 6 | 6 | ||||||||||||||||||||
 R Arneodo Q Halys | 6 | 3 | [10] | R Arneodo Q Halys | 2 | 4 | |||||||||||||||||||||
| 4 | D Molchanov M Reid | 2 | 6 | [4] | WC | A Hoang K Jacquet | 6 | 61 | [10] | ||||||||||||||||||
| H Reese D Vega Hernández | 6 | 3 | [8] | R Galloway A Lawson | 4 | 77 | [6] | ||||||||||||||||||||
 T Huey  F Nielsen | 4 | 6 | [10] | T Huey F Nielsen | 6 | 5 | [3] | ||||||||||||||||||||
| R Galloway A Lawson | 6 | 4 | [12] | R Galloway A Lawson | 3 | 7 | [10] | ||||||||||||||||||||
| 2 | L Glasspool H Heliövaara | 3 | 6 | [10] | |||||||||||||||||||||||
Riccardo Ghedin and Stéphane Robert were the defending champions but decided not to participate.
Pierre-Hugues Herbert and Albano Olivetti defeated Paul Hanley and Jordan Kerr 7–5, 1–6, [10–7] in the final to win the title.
Vasek Pospisil and Bobby Reynolds were the defending champions but decided not to participate together.
Reynolds played alongside Carsten Ball, while Pospisil played with Pierre-Ludovic Duclos.
Martin Emmrich and Andreas Siljeström won the title, defeating Artem Sitak and Blake Strode 6–2, 7–6(7–4) in the final.
Evgeny Donskoy was the defending champion, but chose to participate at the 2013 Odlum Brown Vancouver Open instead.
Sanchai Ratiwatana and Sonchat Ratiwatana were the defending champions, but decided to compete at the ATP Challenger Guangzhou instead.
Henri Kontinen and Konstantin Kravchuk won the title, defeating Pierre-Hugues Herbert and Albano Olivetti in the final, 6–4, 6–7(3–7), [10–7].
Albert Montañés was the defending champion, but lost to Ernests Gulbis in the semifinals. Gulbis went on to win the title, defeating Federico Delbonis in the final, 6–1, 7–6(7–5).
Roger Federer was the defending champion and successfully defended his title, defeating Alejandro Falla in the final, 7–6(7–2), 7–6(7–3).
Pierre-Hugues Herbert and Albano Olivetti were the defending champions, but chose not to participate.
Philipp Petzschner and Tim Pütz are the defending champions, but decided not to defend their title.
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.
Lucas Pouille was the defending champion, but lost in the second round to Marcos Baghdatis.
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.
Romain Arneodo and Hugo Nys were the defending champions but lost in the quarterfinals to Benjamin Bonzi and Antoine Hoang.
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 Kazakh players to reach a major final.
Enzo Couacaud and Albano Olivetti were the defending champions but chose not to defend their title.
This was the first edition of the tournament.
Ruben Bemelmans and Daniel Masur were the defending champions but lost in the first round to Marc-Andrea Hüsler and Dominic Stricker.
Sriram Balaji and Ramkumar Ramanathan were the defending champions but chose not to defend their title.
Pierre-Hugues Herbert and Albano Olivetti were the defending champions but chose not to defend their title.
Antonio Šančić and Artem Sitak were the defending champions but only Sitak chose to defend his title, partnering Sem Verbeek. Sitak lost in the first round to Dan Added and Albano Olivetti.
Pierre-Hugues Herbert and Albano Olivetti were the defending champions but chose not to defend their title.