Stadium: Center Round: 26 Ground: Clay
| 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 |
| ITF M15 Prijedor | 2024/05/14 16:05 | Marcel Zielinski v Liviu Popirlan | 6-0,6-2 |
| ITF M15 Kamen | 2024/06/26 12:00 | Jurriaan Bol v Tom Gentzsch | 5-7,6-3,6-7 |
| Challenger Augsburg | 2024/05/20 11:15 | Tom Gentzsch v Felix Gill | 6-1,7-6 |
| ITF M15 Villach | 2024/05/17 14:30 | Jerome Kym v Tom Gentzsch | 6-1,6-4 |
| ITF M15 Villach | 2024/05/17 09:50 | Tom Gentzsch v Luca Giacomini | 7-6,7-5 |
| ITF M15 Villach | 2024/05/15 12:05 | Tom Gentzsch v Leopold Zima | 6-4,6-3 |
| ITF M15 Villach | 2024/05/14 09:05 | Tom Gentzsch v Keegan Rice | 6-1,6-0 |
| ITF M25 Varnamo | 2024/05/10 08:10 | Tom Gentzsch v Marvin Moeller | 6-7,2-6 |
| ITF M25 Varnamo | 2024/05/09 10:15 | Tom Gentzsch v Leyton Rivera | 6-2,6-3 |