Stadium: TennisClub GRÜN-WEISS Ahaus E.V. - Court 4 Round: 28 Ground: Clay
Referee:
| ITF M15 Valencia | 2025/02/12 15:17 | Max Alcala Gurri v Marcel Zielinski | 6-3,5-3 |
| ITF M15 Valencia | 2024/11/11 09:00 | Marcel Zielinski v Anas Mazdrashki | 2-6,5-7 |
| ITF M15 Valencia | 2024/11/10 13:00 | Marcel Zielinski v Pere Prat Turro | 7-6,6-3 |
| ITF M15 Melilla | 2024/09/20 07:30 | Benjamin Winter Lopez v Marcel Zielinski | 7-6,6-1 |
| ITF M15 Melilla | 2024/09/18 12:15 | Gabriel Elicha Navas v Marcel Zielinski | 2-6,3-6 |
| Challenger Dobrich | 2024/09/08 13:15 | Marcel Zielinski v Dominik Kellovsky | 3-6,1-6 |
| ITF M15 Constanta | 2024/09/05 07:00 | Matteo De Vincentis v Marcel Zielinski | 7-6,6-3 |
| ITF M15 Constanta | 2024/09/04 06:30 | Gabriel Ghetu v Marcel Zielinski | 3-6,2-6 |
| ITF M25 Esch/Alzette | 2024/07/15 12:25 | Tim Hammes v Louis Van Herck | 4-6,4-6 |
| ITF M25 Esch/Alzette | 2024/07/14 07:55 | Tim Hammes v Leonardo Mileikowsky | 7-6,6-4 |
| ITF M25 Esch/Alzette | 2023/12/31 11:30 | Tim Hammes v Harold Van Raemdonck | 6-7,4-6 |
| ITF M25 Marburg | 2023/07/04 10:05 | Daniel Salazar v Tim Hammes | 7-6,6-2 |
| ITF M25 Marburg | 2023/07/03 14:30 | Tim Hammes v Jeremy Schifris | 7-5,2-6,10-3 |
| UTR Pro Tennis Series Mulheim | 2022/07/02 09:00 | Kody Pearson v Tim Hammes | 6-3,6-7,5-2 |
| UTR Pro Tennis Series Mulheim | 2022/06/30 06:00 | Charly Zick v Tim Hammes | 7-6,6-1 |
| UTR Pro Tennis Series Mulheim | 2022/06/28 06:00 | Nicholas Campbell v Tim Hammes | 1-6,6-3,3-5 |