Stadium: Court 7 Round: 26 Ground: Clay
| Challenger Bucharest MD | 2021/09/23 14:10 | Jecan/Tomescu v Erler/Miedler | 0-6,6-4,11-9 |
| Challenger Bucharest MD | 2021/09/21 11:55 | Bonadio/Travaglia v Erler/Miedler | 3-6,3-6 |
| Challenger Tulln MD | 2021/09/07 12:15 | Erler/Miedler v Haerteis/Hassan | 3-6,6-2,9-11 |
| Challenger Como MD | 2021/09/03 09:00 | Matos/M R Alves v Erler/Miedler | 7-5,6-2 |
| Challenger Como MD | 2021/09/02 10:40 | Bortolotti/Cuevas v Erler/Miedler | 6-4,4-6,4-10 |
| Challenger Como MD | 2021/09/01 09:25 | Baldi/Ocleppo v Erler/Miedler | 2-6,3-6 |
| Challenger Warsaw MD | 2021/08/27 16:20 | Lenz/Verbeek v Erler/Miedler | 6-7,6-2,10-5 |
| ATP Kitzbuhel MD | 2021/07/31 11:00 | Erler/Miedler v Jebavy/Middelkoop | 7-5,7-6 |