Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Esch/Alzette | 2023/07/13 14:30 | Marcel Zielinski v Brian Bozemoj | 6-2,6-4 |
| ITF M25 Esch/Alzette | 2023/07/12 11:35 | Marcel Zielinski v Boris Fassbender | 6-3,6-1 |
| ITF M15 Sofia | 2023/07/06 08:10 | Matej Dodig v Marcel Zielinski | 6-4,6-2 |
| ITF M15 Sofia | 2023/07/05 09:45 | Alessandro Ingarao v Marcel Zielinski | 0-6,3-6 |
| ITF M15 Kamen | 2023/06/28 10:50 | Matyas Cerny v Marcel Zielinski | 6-4,6-4 |
| ITF M15 Saarlouis | 2023/06/23 16:30 | Marcel Zielinski v Jeffrey Von Der Schulenburg | 6-7,6-2,1-6 |
| ITF M15 Saarlouis | 2023/06/22 09:30 | Marcel Zielinski v Tim Heger | 6-0,6-3 |
| ITF M15 Saarlouis | 2023/06/21 09:25 | Mika Brunold v Marcel Zielinski | 3-6,1-6 |
| ITF M25 Prague | 2023/05/14 12:30 | Michael Agwi v Jakub Filip | 6-1,6-2 |
| Challenger Prague Qual | 2023/05/07 14:50 | Jakub Filip v Timo Stodder | 6-3,4-6,4-6 |
| ITF M15 Metzingen | 2022/07/17 13:00 | Jakub Filip v Max Wiskandt | 6-3,3-6,10-12 |
| ITF M25 Jablonec Nad Nisou | 2022/05/25 08:00 | Jakub Filip v Michael Vrbensky | 5-7,1-6 |
| ITF M25 Jablonec Nad Nisou | 2022/05/24 10:00 | Roman Postolka v Jakub Filip | 6-7,6-3,3-10 |
| ITF M25 Jablonec Nad Nisou | 2022/05/23 09:30 | Jakub Filip v Stepan Pecak | 6-2,6-4 |