Stadium: Court 2 Round: 19 Ground: Hardcourt outdoor
| ITF M15 Szczawno | 2025/09/03 15:00 | Jannik Opitz v Aleksander Chayka | 6-3,6-7,2-4 |
| ITF M15 Krakow | 2025/08/20 07:30 | Jakub Filip v Jannik Opitz | 6-2,3-6,6-2 |
| ITF M15 Uslar | 2025/07/16 16:42 | Jannik Opitz v Adrian Oetzbach | 6-7,3-6 |
| Challenger Braunschweig | 2025/07/06 12:15 | Jannik Opitz v Toby Alex Kodat | 6-4,4-6,4-6 |
| ITF M25 Brussels | 2025/06/24 09:30 | David Tixhon v Jannik Opitz | 7-6,7-6 |
| ITF M25 Brussels | 2025/06/23 10:30 | James Wilkinson v Jannik Opitz | 0-6,1-6 |
| ITF M25 Sharm El Sheikh | 2025/04/16 09:30 | Jannik Opitz v Lorenzo Rottoli | 3-6,2-6 |
| ITF M25 Sharm El Sheikh | 2025/04/15 08:00 | Michael Zhu v Jannik Opitz | 5-7,7-5,0-1 |
| ITF M25 Monastir | 2025/10/09 10:31 | Jack Loge v Daniil Ostapenkov | 6-4,4-6,7-6 |
| ITF M25 Monastir | 2025/10/08 08:30 | Louis Tessa v Daniil Ostapenkov | 2-6,2-4 |
| ITF M25 Sharm El Sheikh | 2025/10/04 07:00 | Amr Asrawy v Daniil Ostapenkov | 7-5,6-4 |
| ITF M25 Sharm El Sheikh | 2025/10/03 07:00 | Leo Borg v Daniil Ostapenkov | 4-6,0-6 |
| ITF M25 Sharm El Sheikh | 2025/10/02 07:00 | Daniil Ostapenkov v Yurii Dzhavakian | 7-6,5-2 |
| ITF M25 Sharm El Sheikh | 2025/10/01 09:27 | Alessandro Coccioli v Daniil Ostapenkov | 1-6,0-6 |
| ITF M25 Sharm El Sheikh | 2025/09/26 07:00 | Daniil Ostapenkov v Fabrizio Andaloro | 3-6,1-6 |
| ITF M25 Sharm El Sheikh | 2025/09/25 07:00 | Fares Zakaria v Daniil Ostapenkov | 4-6,5-7 |