Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Vyshkovo | 2021/09/23 07:00 | Dragos Constantin Ignat v Aleksandr Braynin | 2-6,3-6 |
| ITF M25 Pensacola | 2021/05/19 15:50 | Dragos Constantin Ignat v Peter Bertran | 4-6,0-6 |
| ITF M25 Pensacola | 2021/05/18 14:25 | Garrett Johns v Dragos Constantin Ignat | 6-7,1-6 |
| ITF M25 Pensacola | 2021/05/17 14:30 | Tommaso Carnevale-Miino v Dragos Constantin Ignat | 2-6,4-6 |
| ITF M25 Naples | 2021/02/23 16:50 | Daniel Dutra Da Silva v Dragos Constantin Ignat | 6-3,6-4 |
| ITF M25 Naples | 2021/02/22 16:00 | Dragos Constantin Ignat v Quentin Folliot | 6-3,6-3 |
| ITF M25 Naples | 2021/02/15 16:00 | Rowland Phillips v Dragos Constantin Ignat | 6-3,7-6 |
| ITF M25 Fayetteville | 2020/11/03 17:30 | Dragos Constantin Ignat v Kiranpal Pannu | 2-6,3-6 |
| 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 |
| 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 |