2021 Open de Rennes – Doubles

Antonio Šančić and Tristan-Samuel Weissborn were the defending champions but chose not to defend their title.

Bart Stevens and Tim van Rijthoven won the title after defeating Marek Gengel and Tomáš Macháč 6–7(2–7), 7–5, [10–3] in the final.

Seeds
• # David Pel / 🇵🇰 Aisam-ul-Haq Qureshi (quarterfinals)

• # Hugo Nys / 🇫🇷 Arthur Rinderknech (first round)

• # 🇫🇷 Manuel Guinard / 🇫🇷 Albano Olivetti (first round)

• # 🇮🇳 Jeevan Nedunchezhiyan / 🇮🇳 Purav Raja (semifinals)