Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 Duffel | 2023/06/14 08:00 | Amaury Raynel v Mika Brunold | 6-4,7-6 |
| ITF M25 Jablonec Nad Nisou | 2023/05/31 11:40 | Martin Damm v Mika Brunold | 6-1,7-6 |
| ITF M25 Most | 2023/05/25 11:10 | Martin Damm v Mika Brunold | 4-6,6-3,6-3 |
| ITF M25 Most | 2023/05/24 12:45 | Milos Karol v Mika Brunold | 2-6,4-6 |
| Challenger Biel | 2023/03/24 18:20 | Marius Copil v Mika Brunold | 6-3,6-3 |
| Challenger Biel | 2023/03/23 15:30 | Max Hans Rehberg v Mika Brunold | 2-6,6-3,3-6 |
| Challenger Biel | 2023/03/22 12:10 | Mika Brunold v Zdenek Kolar | 6-1,6-4 |
| ITF M25 Trimbach | 2023/03/16 09:00 | Mika Brunold v Daniel Masur | 2-6,2-6 |
| ITF M15 Meerbusch | 2023/04/27 08:55 | Marcel Zielinski v Liam Gavrielides | 6-7,1-6 |
| ITF M15 Meerbusch | 2023/04/26 09:00 | Marcel Zielinski v John Sperle | 7-6,7-5 |
| ITF M15 Telde | 2023/04/23 09:00 | Marcel Zielinski v Alejandro Manzanera Pertusa | 4-6,6-7 |
| ITF M15 Telde | 2023/04/22 09:00 | Kai Lemstra v Marcel Zielinski | 2-6,4-6 |
| ITF M15 Telde | 2023/04/21 09:00 | Marcel Zielinski v Martin Cuevas | 6-4,6-1 |
| ITF M15 Telde | 2023/04/20 12:30 | Jorge Martinez Martinez v Marcel Zielinski | 3-6,2-6 |
| ITF M15 Telde | 2023/04/18 08:00 | Marcel Zielinski v Benjamin Winter Lopez | 3-6,6-2,6-4 |
| ITF M15 Telde | 2023/04/17 08:00 | Marcel Zielinski v Ian Luca Cervantes Tomas | 6-4,6-2 |