Stadium: Court 1 Round: 28 Ground: Hardcourt outdoor
| Challenger St. Tropez MD | 2021/09/02 11:25 | Grenier/Muller v 네둔체지얀 J / 라자 P | 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 MD | 2021/02/25 08:25 | Lenz/Quiroz v Grenier/Muller | 6-4,6-3 |
| Challenger Nur-Sultan MD | 2021/02/24 04:00 | Marterer/Rola v Grenier/Muller | 4-6,4-6 |
| Challenger St. Tropez MD | 2021/09/02 15:10 | 차잘 M / 테사 L v Sancic/Sitak | 2-6,4-6 |
| Challenger St. Tropez MD | 2021/09/01 12:35 | Fabbiano/Masur v Sancic/Sitak | 6-7,2-6 |
| Challenger Luedenscheid MD | 2021/08/18 12:35 | Moeller/Sandkaulen v Sancic/Sitak | 6-1,6-2 |
| Challenger Meerbusch MD | 2021/08/13 15:00 | Sancic/Sitak v Brown/Haase | 4-6,4-6 |
| Challenger Meerbusch MD | 2021/08/12 11:50 | Molchanov D / Nedovyesov A v Sancic/Sitak | 6-7,5-7 |
| Challenger Meerbusch MD | 2021/08/10 09:30 | Sancic/Sitak v Fallert F / Haerteis J | 7-5,6-4 |