Stadion: Court Le Liberte Round: 29 Ground: Hardcourt indoor
| Challenger - Rennes - Herrendoppel | 2021/09/17 10:55 | Gengel/Machac v Lamasine/Simon | 7-6,6-1 |
| Challenger - Rennes - Herrendoppel | 2021/09/16 14:00 | Pel/Qureshi v Gengel/Machac | 6-7,6-7 |
| Challenger - Rennes - Herrendoppel | 2021/09/15 11:00 | Gengel/Machac v Kamke/Maden | 6-7,6-2,10-8 |
| Challenger - Rennes - Herrendoppel | 2021/09/17 09:00 | Nedunchezhiyan/Raja v Stevens/Van Rijthoven | 6-4,6-7,8-10 |
| Challenger - Rennes - Herrendoppel | 2021/09/16 09:00 | Hermans/Smits v Stevens/Van Rijthoven | 3-6,2-6 |
| Challenger - Rennes - Herrendoppel | 2021/09/15 09:50 | Stevens/Van Rijthoven v Nys/Rinderknech | 1-6,7-5,10-8 |