Stadium: Court 1 Round: 27 Ground: Hardcourt indoor
| Challenger Brest - Herrdubbel | 2021/10/27 13:30 | Martineau/Piros v Grenier/Muller | 4-6,5-7 |
| Challenger Istanbul MD | 2021/09/15 14:00 | Grenier/Muller v Cerretani/Fallert | 1-6,5-7 |
| Challenger St. Tropez - Herrdubbel | 2021/09/04 14:45 | Grenier/Muller v Sancic/Sitak | 2-6,6-3,5-10 |
| Challenger St. Tropez - Herrdubbel | 2021/09/02 11:25 | Grenier/Muller v Nedunchezhiyan/Raja | 4-6,6-1,10-2 |
| Challenger Biella MD | 2021/06/03 15:10 | Silva/Zuk v Grenier/Muller | 6-2,6-3 |
| Challenger Biella MD | 2021/06/02 13:05 | Collarini/Galdos v Grenier/Muller | 6-7,4-6 |
| Challenger Nur-Sultan - Herrdubbel | 2021/02/25 08:25 | Lenz/Quiroz v Grenier/Muller | 6-4,6-3 |
| Challenger Nur-Sultan - Herrdubbel | 2021/02/24 04:00 | Marterer/Rola v Grenier/Muller | 4-6,4-6 |
| Challenger Brest - Herrdubbel | 2021/10/27 09:00 | Cerretani/Fallert v Kolar/Vega Hernandez | 6-7,3-6 |