Stadium: Court 16 Round: 26 Ground: Clay
| ITF M15 Eindhoven | 2023/08/01 13:45 | Patrick Zahraj v Christian Lerby | 4-6,3-6 |
| ITF M15 Eindhoven | 2023/07/31 08:00 | Brian Bozemoj v Christian Lerby | 7-6,2-6,9-11 |
| ITF M15 Eindhoven | 2023/07/30 10:30 | Ruben Hartig v Christian Lerby | 6-4,1-6,11-13 |
| ITF M15 Casablanca | 2023/06/20 09:00 | Vladislav Ivanov v Christian Lerby | 1-6,6-3,10-3 |
| ITF M15 Casablanca | 2023/06/19 12:00 | Christian Lerby v Niccolo Baroni | 6-3,6-1 |
| ITF M15 Norman | 2022/10/27 17:40 | Christian Lerby v Yuta Kikuchi | 4-6,2-6 |
| ITF M15 Norman | 2022/10/26 15:00 | Christian Lerby v Yannik Rahman | 6-4,6-0 |
| ITF M25 Norman | 2022/10/25 07:00 | Franco Ribero v Christian Lerby | 1-6,3-6 |
| ITF M15 Eindhoven | 2023/08/01 15:20 | Alexis Boureau v Marcel Zielinski | 1-6,1-6 |
| 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 |