Stadium: Court 6 Round: 62 Ground: Clay
| ITF M15 Sofia | 2021/07/09 08:30 | Gabriel Donev v Alexander Weis | 6-4,3-6,6-7 |
| ITF M15 Sofia | 2021/07/08 11:40 | Terziev, Simeon v Gabriel Donev | 1-6,6-4,0-6 |
| ITF M15 Sofia | 2021/07/07 08:50 | Frinzi, Mattia v Gabriel Donev | 5-7,2-6 |
| ITF M15 Novomoskovsk | 2021/06/03 11:45 | Alexander Zgirovsky v Gabriel Donev | 6-2,3-6,10-8 |
| ITF M15 Novomoskovsk | 2021/05/31 06:15 | Gabriel Donev v Parshutin, Denis | 6-0,6-4 |
| ITF M15 Novomoskovsk | 2021/05/31 06:15 | Gabriel Donev v Boychuk, Roman | 6-1,6-0 |
| ITF M15 Novomoskovsk | 2021/05/26 09:05 | Nedelko, Ivan v Gabriel Donev | 6-3,6-4 |
| ITF M15 Novomoskovsk | 2021/05/25 08:45 | Gabriel Donev v Alexander Zgirovsky | 6-4,6-2 |
| ITF M15 Skopje | 2021/05/31 11:00 | Durguti, Besir v Taiyo Yamanaka | 2-6,2-6 |
| ITF - M15 Brcko | 2021/05/17 15:30 | Durguti, Besir v Milanovic, Dusan | 3-6,2-6 |
| ITF - M15 Prijedor | 2021/05/09 07:00 | Kawakami, Rimpei v Durguti, Besir | 6-3,6-2 |
| ITF - M15 Antalya | 2021/03/08 10:00 | Bertuccioli, Federico v Durguti, Besir | 6-3,3-6,10-7 |
| ITF - M15 Antalya | 2021/02/28 08:00 | Durguti, Besir v Mathys Erhard | 1-6,3-6 |
| ITF - M15 Antalya | 2020/03/09 08:00 | Sergi Perez Contri v Durguti, Besir | 6-2,6-2 |
| ITF - M15 Antalya | 2020/03/08 08:00 | Donmezer, Enes v Durguti, Besir | 0-2 |
| ITF - M15 Antalya | 2020/03/01 07:00 | Durguti, Besir v Daniil Savelev | 6-0,6-0 |