Stadium: Court 2 Round: 26 Ground: Clay
| 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 M15 Meerbusch | 2023/04/27 08:55 | Marcel Zielinski v Liam Gavrielides | 6-7,1-6 |
| ITF M25 Esch/Alzette | 2023/07/12 08:00 | Brian Bozemoj v Guy Den Ouden | 6-4,6-3 |
| ITF M25 Esch/Alzette | 2023/07/10 14:40 | Alexander Stater v Brian Bozemoj | 7-6,3-6,4-10 |
| ITF M25 Esch/Alzette | 2023/07/10 09:30 | Brian Bozemoj v Guy Den Heijer | 6-2,4-6,16-14 |
| ITF M25 Esch/Alzette | 2023/07/09 08:50 | Aloys J W Van Baal v Brian Bozemoj | 3-6,4-6 |
| ITF M25 The Hague | 2023/07/04 10:00 | Eric Vanshelboim v Brian Bozemoj | 6-3,6-1 |
| ITF M15 Alkmaar | 2023/06/30 12:10 | Brian Bozemoj v Elmer Moller | 2-6,4-6 |
| ITF M15 Alkmaar | 2023/06/29 14:55 | Dax Donders v Brian Bozemoj | 6-0,4-6,0-6 |
| ITF M15 Alkmaar | 2023/06/28 13:15 | Brian Bozemoj v Lewie Lane | 6-4,6-2 |