Stadium: Court 5 Round: 27 Ground: Clay
| ITF M15 Novi Sad | 2021/07/29 09:25 | Gabriel Donev v Gorazd Srbljak | 6-2,6-4 |
| ITF M15 Novi Sad | 2021/07/28 11:10 | Ivan Nedelko v Gabriel Donev | 4-6,1-6 |
| ITF M15 Novi Sad | 2021/07/26 09:00 | Gabriel Donev v Dusan Rajic | 6-2,6-2 |
| ITF M15 Novi Sad | 2021/07/25 12:00 | Gabriel Donev v Besir Durguti | 6-1,6-1 |
| 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 | Simeon Terziev v Gabriel Donev | 1-6,6-4,0-6 |
| ITF M15 Sofia | 2021/07/07 08:50 | Mattia Frinzi 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 Perugia | 2021/07/21 13:00 | Juan Pablo Paz v Alessandro Pecci | 3-6,4-6 |
| ITF M15 Bergamo | 2021/06/24 10:40 | Juan Ignacio Galarza v Juan Pablo Paz | 6-3,7-6 |
| ITF M15 Bergamo | 2021/06/22 18:40 | Juan Pablo Paz v Alessandro Bega | 4-6,6-0,6-3 |
| ITF M15 Genova | 2021/06/17 11:30 | Juan Pablo Paz v Luca Nardi | 3-6,2-6 |
| UTR Pro Tennis Series Bucharest | 2021/06/05 07:00 | Juan Pablo Paz v Oscar Jose Gutierrez | 3-6,1-6 |
| UTR Pro Tennis Series Bucharest | 2021/06/04 08:30 | Juan Pablo Paz v Petru-Alexandru Luncanu | 6-3,6-1 |
| UTR Pro Tennis Series Bucharest | 2021/06/03 09:00 | Juan Pablo Paz v Vlad Andrei Dumitru | 6-2,5-1 |
| UTR Pro Tennis Series Bucharest | 2021/06/02 16:00 | Juan Pablo Paz v Anatoliy Petrenko | 6-4,6-2 |