Stadium: Court 4 Round: 26 Ground: Hardcourt outdoor
| Challenger Tulln MD | 2021/09/10 08:30 | Haerteis/Hassan v Matos/M R Alves | 3-6,6-7 |
| Challenger Tulln MD | 2021/09/09 09:00 | Haerteis/Hassan v Gengel/Ignatik | 6-3,6-3 |
| Challenger Tulln MD | 2021/09/07 12:15 | Erler/Miedler v Haerteis/Hassan | 3-6,6-2,9-11 |
| Challenger Ludwigshafen MD | 2019/07/03 15:30 | Lammons/Romboli v Haerteis/Hassan | 6-2,6-7,10-3 |
| Challenger Savannah MD | 2019/05/02 19:30 | Haerteis/Hassan v Gomez/Withrow | 6-7,4-6 |