| UTR Pro Tennis Series Pazardzhik | 2021/04/05 13:00 | Constant De La Bassetiere v Gabriel Donev | 5-7,1-6 |
| ITF M15 Antalya | 2021/03/30 07:00 | Gabriel Donev v Diego A B Sanchez | 4-6,6-1,7-10 |
| ITF M15 Antalya | 2021/03/29 07:00 | Gabriel Donev v Stefanos Sakellaridis | 6-3,5-7,10-2 |
| ITF M15 Antalya | 2021/03/28 06:30 | Gabriel Donev v Mikail Alimli | 6-1,6-2 |
| ITF M15 Antalya | 2021/03/24 06:30 | Gabriel Donev v Max Alcala Gurri | 1-6,1-6 |
| ITF M15 Antalya | 2021/03/22 07:00 | Gabriel Donev v Bautista Vilicich | 6-1,6-3 |
| ITF M15 Antalya | 2021/03/21 07:00 | Gabriel Donev v Rafael Giotis | 7-5,6-0 |
| ITF M15 Antalya | 2021/02/20 07:00 | Gabriel Donev v Matias Zukas | 1-6,7-6,3-6 |