| Doubles | |
|---|---|
| 2012 Open de Rennes | |
| Champions |  Philipp Marx  Florin Mergea |
| Runners-up |  Tomasz Bednarek Mateusz Kowalczyk |
| Final score | 6–3, 6–2 |
Martin Emmrich and Andreas Siljeström were the defending champions but decided not to participate.
Philipp Marx and Florin Mergea won the title, defeating Tomasz Bednarek and Mateusz Kowalczyk 6–3, 6–2 in the final.
Pierre-Hugues Herbert / Michaël Llodra (quarterfinals, withdrew)
Johan Brunström / 
Raven Klaasen (quarterfinals) Tomasz Bednarek / Mateusz Kowalczyk (final) Philipp Marx / Florin Mergea (champions)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | P-H Herbert M Llodra | 7 | 6 | ||||||||||||||||||||||||
 D Rice S Thornley | 5 | 3 | 1 | P-H Herbert M Llodra | |||||||||||||||||||||||
 M Authom Y Mertens | 3 | 5 | M Gicquel A Olivetti | w/o | |||||||||||||||||||||||
| M Gicquel A Olivetti | 6 | 7 | M Gicquel A Olivetti | 64 | 4 | ||||||||||||||||||||||
| 3 | T Bednarek M Kowalczyk | 78 | 7 | 3 | T Bednarek M Kowalczyk | 77 | 6 | ||||||||||||||||||||
 M Draganja L Zovko | 66 | 5 | 3 | T Bednarek M Kowalczyk | 6 | 6 | |||||||||||||||||||||
 F Delbonis  C Poch-Gradin | 77 | 7 | F Delbonis C Poch-Gradin | 4 | 3 | ||||||||||||||||||||||
| WC |  D Petrović Sami Reinwein | 65 | 5 | 3 | T Bednarek M Kowalczyk | 3 | 2 | ||||||||||||||||||||
 A Bedene  C Ebelthite | 6 | 6 | 4 | P Marx F Mergea | 6 | 6 | |||||||||||||||||||||
| F Krajinović M Przysiężny | 4 | 3 | A Bedene C Ebelthite | 1 | 5 | ||||||||||||||||||||||
| F Martin Julien Obry | 3 | 611 | 4 | P Marx F Mergea | 6 | 7 | |||||||||||||||||||||
| 4 | P Marx F Mergea | 6 | 713 | 4 | P Marx F Mergea | 6 | 6 | ||||||||||||||||||||
| WC | Alexandre David Constant Lestienne | 1 | 2 | N Desein P Torebko | 3 | 2 | |||||||||||||||||||||
| N Desein P Torebko | 6 | 6 | N Desein P Torebko | 77 | 6 | ||||||||||||||||||||||
| Arnaud Gerard Glenn le Floch-Moen | 2 | 1 | 2 | J Brunström R Klaasen | 64 | 4 | |||||||||||||||||||||
| 2 | J Brunström R Klaasen | 6 | 6 | ||||||||||||||||||||||||
Michael Kohlmann and Philipp Marx were the defending champions; however, they chose participating in ATP World Tour tournaments .
Ilija Bozoljac and Jamie Delgado won in the final 6–3, 6–3, against Dustin Brown and Martin Slanar.
Jan Hájek and Robin Vik were the defending champions; however, Hajek chose to compete in Rome instead and Vik chose not to compete this year.
Martin Fischer and Philipp Oswald won in the final 2–6, 7–6(6), [10–8], against Tomasz Bednarek and Mateusz Kowalczyk.
Rameez Junaid and Philipp Marx were the defending champions, but only Marx played this year.
Marx and Sebastian Rieschick were eliminated by Jesse Huta Galung and Igor Sijsling in the quarterfinals.
Jonathan Marray and Jamie Murray won in the final 6–1, 6–4, against Sergei Bubka and Sergiy Stakhovsky.
Tomasz Bednarek and Mateusz Kowalczyk were the defending champions, but they didn't compete together
Bednarek played with Mischa Zverev and Kowalczyk partnered with Lukáš Rosol, but they lost in the first round.
Dustin Brown and Rogier Wassen defeated Rameez Junaid and Philipp Marx 6–4, 7–5 to win the final.
Martin Fischer and Philipp Oswald were the defending champions, but decided not to participate.
Olivier Charroin and Stéphane Robert defeated Andis Juška and Alexandre Kudryavtsev 6–4, 6–3 in the final.
Rik de Voest and Lukáš Rosol were the defending champions but decided not to participate.
Martin Fischer and Philipp Oswald were the defending champions, but decided not to participate.
Tomasz Bednarek and Mateusz Kowalczyk won this tournament by defeating Alexander Bury and Andrei Vasilevski 6–2, 6–4 in the final.
Olivier Charroin and Stéphane Robert were the defending champions but decided not to participate that year.
Rameez Junaid and Simon Stadler won the final 6–3, 6–4 against Adam Hubble and Nima Roshan.
Dustin Brown and Horacio Zeballos were the defending champions but Zeballos decided not to participate.
Brown played alongside Lukáš Dlouhý, losing in the first round.
Andre Begemann and Martin Emmrich won the title, defeating Dominik Meffert and Philipp Oswald 6–3, 6–1 in the final.
The 2012 Open de Rennes was a professional tennis tournament played on hard courts. It was the seventh edition of the tournament which was part of the 2012 ATP Challenger Tour. It took place in Rennes, France between 8 and 14 October 2012.
Jamie Delgado and Ken Skupski were the defending champions but did not participate.
Karol Beck and Andrej Martin won the final 6–3, 3–6, [10–8] against Claudio Grassi and Amir Weintraub.
Tomasz Bednarek and Olivier Charroin were the defending champions but decided not to participate.
Sam Groth and John-Patrick Smith defeated Philipp Marx and Florin Mergea 7–6(7–5), 7–6(9–7) in the final to win the title.
Dustin Brown and Jonathan Marray were the defending champions but Marray decided not to participate.
Brown played alongside Jamie Delgado, but they lost in the quarterfinals to Dominik Meffert and Philipp Oswald.
Andreas Beck and Martin Fischer defeated Martin Emmrich and Rameez Junaid 7–6(7–2), 6–0 in the final to win the title.
Tomasz Bednarek and Mateusz Kowalczyk were the defending champions, and won the title again by beating Andreas Siljeström and Igor Zelenay 6–2, 7–6(7–4).
Tomasz Bednarek and Andreas Siljeström were the defending champions, but decided not to compete.
Facundo Bagnis and Thomaz Bellucci were the defending champions, but Bellucci chose not to participate. Bagnis played alongside Marco Cecchinato, but lost in the first round to Michael Berrer and Alexander Zverev.
Mateusz Kowalczyk and Artem Sitak won the title, defeating Guillermo García-López and Philipp Oswald in the final, 2–6, 6–1, [10–7].
Johan Brunström and Raven Klaasen were the defending champions, but Klaasen chose not to participate. Brunström plays alongside Philipp Oswald, but they lost in the first round to Tomasz Bednarek and André Sá.
Mariusz Fyrstenberg and Marcin Matkowski won the title, defeating Marin Draganja and Henri Kontinen in the final, 6–7(3–7), 6–3, [10–8].
Illya Marchenko and Sergiy Stakhovsky were the defending tennis doubles champions, but neither player chose to participate.
Jürgen Melzer and Philipp Petzschner were the defending champions, but chose not to participate this year.
Łukasz Kubot and Marcelo Melo won the title, defeating Jamie Murray and John Peers in the final, 4–6, 7–6(7–3), [10–6].
Sergey Betov and Mikhail Elgin were the defending champions but only Betov returned, partnering Tomasz Bednarek. Betov lost in the quarterfinals to Mateusz Kowalczyk and Antonio Šančić.