Stadium: Main Court Round: 25 Ground: Clay
| ITF M15 Opatija | 2023/03/22 08:30 | Viacheslav Bielinskyi v Nikita Mashtakov | 6-3,6-4 |
| UTF Invitational | 2020/06/13 13:00 | Nikita Mashtakov v Viacheslav Bielinskyi | 6-2,6-3 |
| UTF Invitational | 2020/06/10 13:00 | Nikita Mashtakov v Viacheslav Bielinskyi | 6-3,6-6 |
| UTR Pro Olomouc | 2023/07/09 06:00 | Nikita Mashtakov v Jonasz Dziopak | 2-6,4-5 |
| UTR Pro Olomouc | 2023/07/08 09:00 | Nikita Mashtakov v Victor Sklenka | 7-6,4-6,6-0 |
| UTR Pro Olomouc | 2023/07/07 08:12 | Oscar Brown v Nikita Mashtakov | 6-1,6-2 |
| UTR Pro Olomouc | 2023/07/06 06:00 | Dominik Suc v Nikita Mashtakov | 6-3,6-2 |
| UTR Pro Olomouc | 2023/07/04 08:30 | Martin Facundo Carrizo v Nikita Mashtakov | 4-6,6-7 |
| UTR Pro Olomouc | 2023/07/03 09:38 | Nikita Mashtakov v Bekkhan Atlangeriev | 6-7,6-4,5-6 |
| ITF M15 Wroclaw | 2023/06/29 07:50 | Nikita Mashtakov v Jiri Barnat | 3-6,6-4,4-6 |
| ITF M15 Wroclaw | 2023/06/27 08:00 | Nikita Mashtakov v Thiago Cigarran | 7-6,7-6 |
| ITF M25 Kassel | 2023/07/11 14:45 | Ryan Nijboer v Viacheslav Bielinskyi | 6-2,6-2 |
| Challenger Karlsruhe | 2023/07/03 09:00 | Oriol Roca Batalla v Viacheslav Bielinskyi | 6-4,6-3 |
| Challenger Karlsruhe | 2023/07/02 09:00 | Viacheslav Bielinskyi v Timo Legout | 3-6,6-1,6-3 |
| ITF M15 Saarlouis | 2023/06/22 09:00 | Viacheslav Bielinskyi v Liam Gavrielides | 3-6,5-7 |
| ITF M15 Saarlouis | 2023/06/20 11:30 | Viacheslav Bielinskyi v Dominik Boehler | 6-2,6-2 |
| ITF M15 Brcko | 2023/05/25 11:15 | Vit Kalina v Viacheslav Bielinskyi | 2-6,3-6 |
| ITF M15 Brcko | 2023/05/24 13:35 | Viacheslav Bielinskyi v David Pichler | 3-6,7-5,6-2 |
| ITF M15 Prijedor | 2023/05/21 10:00 | Andrej Nedic v Viacheslav Bielinskyi | 6-4,2-6,6-1 |