Stadium: Court 1 Round: 26 Ground: Clay
| ITF M25 Trier MD | 2021/08/25 13:00 | Wehnelt/Zahraj v Melzer/Sudzum | 6-2,6-0 |
| ITF M25 Koksijde MD | 2021/08/18 10:00 | Beaupain/Perchicot v Melzer/Sudzum | 6-2,6-3 |
| ITF M25 Uriage MD | 2021/07/13 12:30 | Melzer/Sudzum v Blanchet/Darras | 3-6,0-6 |
| ITF M25 Marburg MD | 2021/07/07 14:00 | Handel/Steinegger v Melzer/Sudzum | 6-1,7-6 |
| ITF M25 Bourg-en-Bresse MD | 2021/06/29 12:00 | Melzer/Sudzum v Aubriot/Salvestre | 2-6,5-7 |