Stadium: Court 10 Round: 25 Ground: Clay
| ITF - M25 Maribor | 2023/09/05 08:00 | Nikita Mashtakov v Gasper Bezjak | 6-4,4-6,10-7 |
| ITF - M25 Maribor | 2023/09/04 07:55 | Nikita Mashtakov v Paolo Angeli | 6-3,6-2 |
| ITF - M25 Bielsko Biala | 2023/08/16 15:05 | Nikita Mashtakov v Viacheslav Bielinskyi | 2-6,4-6 |
| 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 |
| ITF - M25 Maribor | 2023/09/05 07:50 | Tim Heger v Enrico Giacomini | 6-3,6-2 |
| ITF - M25 Maribor | 2023/09/04 08:00 | Tim Heger v Lukas Rohseano | 6-2,6-2 |
| ITF - M25 Maribor | 2023/08/30 13:50 | Tim Heger v Matvey Minin | 4-6,1-6 |
| ITF - M25 Maribor | 2023/08/29 09:30 | Tim Heger v Carlo Angeli | 6-4,6-2 |
| ITF - M25 Maribor | 2023/08/28 12:30 | Tim Heger v Vito Horvat | 6-2,6-0 |
| ITF - M15 Ueberlingen | 2023/08/17 10:50 | Arthur Nagel v Tim Heger | 7-6,6-4 |
| ITF - M15 Ueberlingen | 2023/08/16 11:25 | Tim Heger v Phil Exner | 6-4,6-2 |
| ITF - M15 Ueberlingen | 2023/08/15 08:00 | Tim Heger v Christopher Patzanovsky | 7-6,6-2 |