Stadium: Hard Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Lambermont | 2022/08/22 08:00 | Marcel Zielinski v Tommaso Vola | 6-2,6-4 |
| ITF M15 Lambermont | 2022/08/22 08:00 | Marcel Zielinski v Jesse De Jager | 6-4,7-6 |
| ITF M15 Eindhoven | 2022/08/18 11:00 | David Pichler v Marcel Zielinski | 6-4,6-1 |
| ITF M15 Eindhoven | 2022/08/16 12:05 | Stijn Slump v Marcel Zielinski | 6-7,4-6 |
| ITF M15 Eindhoven | 2022/08/15 11:00 | Marcel Zielinski v John Sperle | 6-2,7-6 |
| ITF M15 Eupen | 2022/08/10 12:50 | Marcel Zielinski v Marlon Vankan | 6-4,4-6,4-6 |
| ITF M15 Eupen | 2022/08/09 10:05 | Lars Goran Verwerft v Marcel Zielinski | 1-6,2-6 |
| ITF M15 Eupen | 2022/08/08 11:30 | Cian Maguire v Marcel Zielinski | 0-6,3-6 |
| ITF Great Britain F5 | 2016/10/30 10:00 | Dragos Iarmil Torge v Damian Rodriguez | 1-6,0-6 |