Stadium: Court 1 Round: 25 Ground: Clay
| ITF M15 Monastir | 2023/04/16 11:30 | Jakob Schnaitter v Oscar Lacides | 6-4,6-3 |
| ITF M15 Monastir | 2023/04/12 08:30 | Omni Kumar v Jakob Schnaitter | 6-0,7-5 |
| ITF M15 Monastir | 2023/04/10 12:30 | Jakob Schnaitter v Zhan Zheng | 6-4,6-2 |
| ITF M15 Monastir | 2023/04/10 08:00 | Jakob Schnaitter v Egor Novikov | 1-6,6-3,10-2 |
| ITF M15 Monastir | 2023/04/09 08:00 | Jakob Schnaitter v Samuel Puskar | 7-5,6-4 |
| ITF M15 Lons-le-Saunier | 2023/04/05 09:00 | Jakob Schnaitter v Lucas Poullain | 7-6,3-6,3-6 |
| ITF M15 Sharm El Sheikh | 2023/03/22 08:00 | Kareem Allaf v Jakob Schnaitter | 6-4,7-6 |
| ITF M15 Sharm El Sheikh | 2023/03/17 08:00 | Robert Strombachs v Jakob Schnaitter | 6-2,6-1 |
| ITF M15 Telde | 2023/04/16 08:00 | Marcel Zielinski v Iker Urribarrens | 7-6,6-2 |
| ITF M15 Telde | 2023/04/14 09:00 | Marcel Zielinski v Vilius Gaubas | 4-6,2-6 |
| ITF M15 Telde | 2023/04/13 09:00 | Michael Zhu v Marcel Zielinski | 2-6,1-6 |
| ITF M15 Telde | 2023/04/11 10:40 | Rodrigo Mora Clement v Marcel Zielinski | 6-4,0-6,0-6 |
| ITF M15 Antalya | 2023/03/12 10:30 | Marcel Zielinski v Andrea Fiorentini | 1-6,2-6 |
| ITF M15 Antalya | 2023/03/09 07:00 | Sean Cuenin v Marcel Zielinski | 6-3,6-0 |
| ITF M15 Antalya | 2023/03/08 11:30 | Marcel Zielinski v Rimpei Kawakami | 6-3,1-6,6-4 |
| ITF M15 Antalya | 2023/03/07 07:00 | Marcel Zielinski v Carlo Alberto Fossati | 3-6,7-6,10-5 |