Stadium: Court 3 Round: 54 Ground: Clay
| ITF - M15 Esch/Alzette | 2021/07/18 11:50 | Maxence Broville v Marcel Hornung | 6-1,6-1 |
| ITF - M25 Plaisir | 2019/09/15 07:30 | Marcel Hornung v Arthur Bouquier | 1-6,0-6 |
| ITF M25 Lasne | 2019/07/01 10:05 | Wilfredo Gonzalez v Marcel Hornung | 6-2,6-1 |
| ITF - M15 Troisdorf | 2019/05/06 07:00 | Marcel Hornung v Bart Van Den Berg | 4-6,2-6 |
| ITF Turkey F41 | 2018/12/16 06:00 | Martins Rocens v Marcel Hornung | 6-2,6-4 |
| ITF Turkey F39 | 2018/12/02 06:30 | Marcel Hornung v Mats Hermans | 3-6,3-6 |
| ITF Turkey F39 | 2018/12/01 06:30 | Marcel Hornung v Aleksandar Tomas | 6-4,6-1 |
| ITF Belgium F7 Qual | 2018/08/04 07:30 | Marcel Hornung v Maikel Borg | 0-6,3-6 |
| 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 |
| ITF - M25 Santa Margherita | 2019/09/10 13:35 | Horst Rieder v Marcel Marlon Sudzum | 2-6,6-2,10-5 |