Stadium: Court 6 Round: 28 Ground: Hardcourt outdoor
| ITF M15 Sozopol | 2021/10/08 08:35 | Tim Handel v Alexander Donski | 3-6,6-3,2-6 |
| ITF M15 Sozopol | 2021/10/05 15:15 | Dragos Constantin Ignat v Alexander Donski | 1-6,2-6 |
| ATP Sofia | 2021/09/27 09:00 | Andreas Seppi v Alexander Donski | 6-3,6-2 |
| ATP Sofia | 2021/09/26 09:00 | Alexander Donski v Jurij Rodionov | 2-6,6-1,7-6 |
| ITF M25 Plaisir | 2021/09/16 09:55 | Robin Bertrand v Alexander Donski | 3-6,3-6 |
| ITF M25 Plaisir | 2021/09/14 08:00 | Alexander Donski v Quentin Robert | 7-5,1-6,6-2 |
| ITF M25 Ricany | 2021/09/02 08:00 | Alexander Donski v Ryan Peniston | 2-6,4-6 |
| ITF M25 Ricany | 2021/09/01 07:55 | Daniel Paty v Alexander Donski | 3-6,3-6 |
| ITF M15 Sozopol | 2021/10/08 07:00 | Kai Wehnelt v Ilya Snitari | 7-6,6-3 |
| ITF M15 Sozopol | 2021/10/07 07:00 | Kai Wehnelt v George Tsivadze | 6-3,6-1 |
| ITF M15 Sozopol | 2021/10/05 09:00 | Kai Wehnelt v Dian Nedev | 6-3,6-3 |
| Challenger Sibiu | 2021/09/27 07:00 | Kai Wehnelt v Stefan Palosi | 6-7,7-6,2-6 |
| ITF M15 Sozopol | 2021/09/19 07:00 | Kai Wehnelt v Ryan James Storrie | 4-6,6-0,2-6 |
| ITF M15 Sozopol | 2021/09/18 07:00 | Kai Wehnelt v Martin Krumich | 6-4,6-2 |
| ITF M15 Sozopol | 2021/09/17 07:00 | Kai Wehnelt v Calin Manda | 4-6,6-4,6-1 |
| ITF M15 Sozopol | 2021/09/16 07:00 | Kai Wehnelt v Joshua Paris | 6-2,6-4 |