Stadium: Center Court Round: 27 Ground: Carpet indoor
| Challenger Ismaning MD | 2021/10/27 19:35 | Jebavy/Nielsen v Gengel/Machac | 2-6,4-6 |
| Challenger Rennes MD | 2021/09/18 11:00 | Gengel/Machac v Stevens/Van Rijthoven | 7-6,5-7,3-10 |
| Challenger Rennes MD | 2021/09/17 10:55 | Gengel/Machac v Lamasine/Simon | 7-6,6-1 |
| Challenger Rennes MD | 2021/09/16 14:00 | Pel/Qureshi v Gengel/Machac | 6-7,6-7 |
| Challenger Rennes MD | 2021/09/15 11:00 | Gengel/Machac v Kamke/Maden | 6-7,6-2,10-8 |
| Challenger Ismaning MD | 2021/10/26 15:30 | Haase/Hermans v Celikbilek/Ilkel | 6-4,6-4 |
| Challenger Losinj MD | 2021/10/21 14:40 | Haase/Hermans v Sancic/Sitak | 5-7,4-6 |
| Challenger Losinj MD | 2021/10/20 08:00 | Haase/Hermans v Genov/Nokic | 6-4,6-4 |