Stadium: Court 5 Round: 27 Ground: Hardcourt outdoor
| 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 |
| Challenger Prague | 2021/08/22 12:00 | Alexander Donski v Facundo Diaz Acosta | 6-4,2-6,5-7 |
| ITF M25 Marburg | 2021/07/08 10:35 | Louis Wessels v Alexander Donski | 6-4,6-7,6-4 |
| ITF M15 Ulcinj | 2021/09/23 08:00 | Mariano Navone v Timo Legout | 6-2,6-1 |
| ITF M15 Ulcinj | 2021/09/22 07:55 | Petar Jovanovic v Timo Legout | 0-6,6-2,2-6 |
| ITF M15 Ulcinj | 2021/09/18 08:00 | Timo Legout v Felix Gill | 5-7,5-7 |
| ITF M15 Ulcinj | 2021/09/17 08:00 | Timo Legout v Samuel Vincent Ruggeri | 6-2,7-6 |
| ITF M15 Ulcinj | 2021/09/16 08:00 | Franco Emanuel Egea v Timo Legout | 2-6,2-6 |
| ITF M15 Ulcinj | 2021/09/15 07:55 | Duje Kekez v Timo Legout | 4-6,4-6 |
| ITF M25 Uriage | 2021/07/15 14:00 | Timo Legout v Calvin Hemery | 6-1,2-6,1-6 |
| ITF M25 Uriage | 2021/07/14 13:40 | Timo Legout v Mirko Martinez | 6-3,6-7,6-4 |