Stadium: Court 3 Round: 25 Ground: Clay
| ITF M15 Antalya | 2024/03/27 08:50 | Marcel Zielinski v John Sperle | 7-5,6-4 |
| ITF M15 Meerbusch | 2023/04/26 09:00 | Marcel Zielinski v John Sperle | 7-6,7-5 |
| ITF M15 Eindhoven | 2022/08/15 11:00 | Marcel Zielinski v John Sperle | 6-2,7-6 |
| ITF M25 Brussels | 2024/06/26 14:15 | Jelle Sels v John Sperle | 2-6,6-3,6-3 |
| ITF M25 Duffel | 2024/06/20 08:00 | John Sperle v Raphael Perot | 6-4,3-6,0-6 |
| ITF M25 Duffel | 2024/06/19 11:35 | Tibo Colson v John Sperle | 2-6,6-4,4-6 |
| ITF M25 Kiseljak | 2024/05/30 09:55 | John Sperle v Daniel Dutra Da Silva | 6-7,2-6 |
| ITF M25 Kiseljak | 2024/05/29 08:00 | John Sperle v Stefan Latinov | 6-3,2-6,7-6 |
| ITF M15 Antalya | 2024/05/17 08:55 | John Sperle v Michael Agwi | 4-6,6-3,5-7 |
| ITF M15 Antalya | 2024/05/16 07:30 | John Sperle v Maxim Mrva | 4-6,7-5,6-3 |
| ITF M15 Antalya | 2024/05/15 10:35 | John Sperle v Edoardo Zanada | 6-3,6-7,6-1 |
| ITF M15 Kamen | 2024/06/27 11:35 | Marcel Zielinski v Tom Gentzsch | 1-6,6-4,3-6 |
| ITF M15 Kamen | 2024/06/26 14:20 | Marcel Zielinski v Evan Furness | 6-1,6-3 |
| Challenger Poznan | 2024/06/16 12:55 | Mircea-Alexandru Jecan v Marcel Zielinski | 6-4,3-6,6-3 |
| ITF M15 Koszalin | 2024/06/13 11:30 | Marcel Zielinski v Patrick Zahraj | 5-7,0-6 |
| ITF M15 Koszalin | 2024/06/12 13:10 | Yurii Dzhavakian v Marcel Zielinski | 4-6,3-6 |
| ITF M15 Grodzisk Mazowiecki | 2024/06/05 11:50 | Piotr Siekanowicz v Marcel Zielinski | 6-4,5-7,6-3 |
| ITF M15 Brcko | 2024/05/22 11:10 | Gabriele Maria Noce v Marcel Zielinski | 6-3,6-4 |
| ITF M15 Prijedor | 2024/05/16 08:00 | Marcel Zielinski v Sander Jong | 1-6,4-6 |