| ITF M15 Alaminos | 2025/03/13 07:30 | Pablo Masjuan Ginel v Marcel Zielinski | 7-6,6-4 |
| ITF M15 Alaminos | 2025/03/12 11:00 | Marcel Zielinski v Adrian Oetzbach | 6-3,4-6,7-5 |
| 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 Opatija | 2025/03/27 10:30 | Neil Oberleitner v Sergi Perez Contri | 6-7,4-6 |
| ITF M15 Opatija | 2025/03/26 11:27 | Antonio Voljavec v Sergi Perez Contri | 2-6,3-5 |
| ITF M15 Rovinj | 2025/03/21 10:00 | Sergi Perez Contri v Viacheslav Bielinskyi | 5-7,5-7 |
| ITF M15 Rovinj | 2025/03/20 10:00 | Sergi Perez Contri v Jonas Kucera | 6-0,3-6,6-3 |
| ITF M15 Rovinj | 2025/03/18 10:30 | Sergi Perez Contri v Jan Kupcic | 6-3,6-1 |
| ITF M15 Porec | 2025/03/12 09:00 | Matej Dodig v Sergi Perez Contri | 6-4,6-1 |
| ITF M15 Villena | 2025/02/27 11:10 | Sergi Perez Contri v Raul Brancaccio | 6-4,5-7,4-6 |
| ITF M15 Villena | 2025/02/26 13:15 | Sergi Perez Contri v Sean Cuenin | 6-4,7-6 |