Stadium: Court 2 Round: 54 Ground: Clay
| ITF M25 - Koksijde | 2021/08/15 09:45 | Bradley Paliska v Idriss Haddouch | 6-7,3-6 |
| ITF M25 - Koksijde | 2021/08/15 10:00 | Marcel Hornung v Marcel Marlon Sudzum | 4-6,6-1,9-11 |
| ITF M15 - Frederiksberg | 2021/08/01 10:00 | Leonardo Catani v Marcel Marlon Sudzum | 7-6,6-2 |
| ITF M15 - Esch/Alzette | 2021/07/18 08:00 | Raphael Collignon v Marcel Marlon Sudzum | 6-4,6-4 |
| ITF M25 - Bourg-en-Bresse | 2021/06/27 12:30 | Marcel Marlon Sudzum v Adan Freire Da Silva | 6-7,0-6 |
| ITF M25 - Alkmaar | 2021/06/20 17:00 | Marcel Marlon Sudzum v Yan Sabanin | 1-6,2-6 |
| ITF M25 - Santa Margherita | 2019/09/23 12:00 | Stephanos Schinas v Marcel Marlon Sudzum | 4-6,5-7 |
| ITF M25 - Santa Margherita | 2019/09/17 12:00 | Marcel Marlon Sudzum v Horst Rieder | 0-6,0-6 |
| ITF M25 - Santa Margherita | 2019/09/16 12:00 | Stephanos Schinas v Marcel Marlon Sudzum | 2-6,7-5,8-10 |