Stadium: Court 4 Round: 25 Ground: Clay
| ITF M15 Sofia | 2021/07/05 12:00 | Mattia Frinzi v Aristotelis Thanos | 7-5,2-6,7-10 |
| ITF M15 Sofia | 2021/07/05 07:00 | Mattia Frinzi v Tommaso Compagnucci | 6-7,7-5,11-9 |
| ITF M15 Sofia | 2021/07/04 06:30 | Mattia Frinzi v Menelaos Efstathiou | 6-2,6-3 |
| ITF M15 Gaiba | 2021/06/11 11:55 | Mattia Frinzi v Antoine Bellier | 3-6,5-7 |
| ITF M15 Gaiba | 2021/06/10 10:45 | Cristian Rodriguez v Mattia Frinzi | 3-6,2-6 |
| ITF M15 Gaiba | 2021/06/09 14:45 | Lorenzo Rottoli v Mattia Frinzi | 3-6,1-6 |
| ITF M15 Gaiba | 2021/06/08 10:30 | Mattia Frinzi v Alessandro Ragazzi | 6-4,6-2 |
| ITF M15 Gaiba | 2021/06/07 14:50 | Mattia Frinzi v Filippo Carpi | 6-2,6-2 |
| 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 Denis Parshutin | 6-0,6-4 |
| ITF M15 Novomoskovsk | 2021/05/31 06:15 | Gabriel Donev v Roman Boychuk | 6-1,6-0 |
| ITF M15 Novomoskovsk | 2021/05/26 09:05 | Ivan Nedelko 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 Novomoskovsk | 2021/05/24 12:00 | Gabriel Donev v Dzianis Zharyn | 7-6,6-7,10-6 |
| ITF M15 Cairo | 2021/05/07 10:15 | Gabriel Donev v Oliver Crawford | 6-3,2-6,2-6 |
| ITF M15 Cairo | 2021/05/06 08:00 | Gabriel Donev v Volodymyr Uzhylovskyi | 6-1,6-1 |