Stadium: Court 2 Round: 44 Ground: Clay
| ITF M15 Doboj | 2021/07/14 14:00 | Zsombor Piros v Boris Butulija | 6-1,7-6 |
| ITF M15 Doboj | 2021/07/13 08:00 | Boris Butulija v Danijal Muminovic | 5-7,2-6 |
| ITF M15 Doboj | 2021/07/12 09:30 | Boris Butulija v Vukovic, Milos | 6-3,6-3 |
| ITF M25 Belgrade | 2021/06/27 09:00 | Boris Butulija v Luka Pavlovic | 4-6,3-6 |
| ITF M15 Skopje | 2021/06/07 07:00 | Cungu, Rrezart v Boris Butulija | 6-1,6-4 |
| ITF M15 Skopje | 2021/06/01 09:30 | Petr Michnev v Boris Butulija | 6-3,6-2 |
| ITF M15 Skopje | 2021/05/30 14:00 | Dian Nedev v Boris Butulija | 6-4,4-6,6-10 |
| ITF M15 Brcko | 2021/05/17 15:30 | Boris Butulija v Drazen Petrovic | 2-6,5-7 |
| ITF M25 Telavi | 2021/07/26 07:30 | Evloev, T. v Bielinskyi, Oleksandr | 2-6,1-6 |
| ITF M15 Novomoskovsk | 2021/05/30 06:15 | Bielinskyi, Oleksandr v Habsuda, Simon | 6-3,3-6,8-10 |
| ITF M15 Novomoskovsk | 2021/05/27 07:15 | Bielinskyi, Oleksandr v Nikita Mashtakov | 6-3,1-6,5-7 |
| ITF M15 Novomoskovsk | 2021/05/26 10:45 | Viacheslav Bielinskyi v Bielinskyi, Oleksandr | 6-7,6-4,0-6 |
| ITF M15 Novomoskovsk | 2021/05/25 11:30 | Cengiz Aksu v Bielinskyi, Oleksandr | 5-7,1-6 |
| ITF M15 Novomoskovsk | 2021/05/25 06:15 | Bielinskyi, Oleksandr v Alcalde, Juan Ignacio | 6-2,6-2 |
| ITF M15 Novomoskovsk | 2021/05/23 10:30 | Parshutin, Denis v Bielinskyi, Oleksandr | 2-6,3-6 |
| ITF M15 Cairo | 2021/04/26 08:00 | Bielinskyi, Oleksandr v Bautista Vilicich | 6-3,2-6,5-10 |