Stadium: Court 1 Round: 14 Ground: Clay
| Challenger Split | 2024/04/07 12:15 | Mircea-Alexandru Jecan v Jonas Forejtek | 3-6,6-7 |
| ITF M15 Antalya | 2024/03/27 07:00 | Vlad Andrei Dancu v Mircea-Alexandru Jecan | 4-6,7-5,6-4 |
| Challenger Murcia | 2024/03/17 10:00 | Samuel Vincent Ruggeri v Mircea-Alexandru Jecan | 7-6,6-3 |
| ITF M15 Antalya | 2023/12/19 11:20 | Samuele Pieri v Mircea-Alexandru Jecan | 6-2,2-6,6-2 |
| ITF M15 Antalya | 2023/12/13 08:00 | Mircea-Alexandru Jecan v Bogdan Bobrov | 6-7,4-6 |
| Challenger Maspalomas | 2023/11/27 10:00 | Vilius Gaubas v Mircea-Alexandru Jecan | 6-3,6-3 |
| Challenger Maspalomas | 2023/11/26 12:35 | Mircea-Alexandru Jecan v Sergi Perez Contri | 6-3,7-6 |
| ITF M15 Antalya | 2023/11/09 07:00 | Dan Alexandru Tomescu v Mircea-Alexandru Jecan | 7-5,6-3 |
| 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 Doboj | 2024/05/09 08:00 | Lilian Marmousez v Marcel Zielinski | 6-1,6-1 |
| ITF M15 Doboj | 2024/05/08 07:30 | Kai Lemstra v Marcel Zielinski | 2-6,4-6 |