Stadium: Center Court Round: 54 Ground: Hardcourt indoor
| ITF - M25 Bourg-en-Bresse | 2021/06/27 12:30 | Marcel Marlon Sudzum v Adan Freire Da Silva | 6-7,0-6 |
| Challenger - Barcelona | 2021/10/03 08:00 | Matteo Martineau v Marcel Marlon Sudzum | 6-2,6-2 |
| ITF - M25 Pardubice | 2021/09/20 08:00 | Marcel Marlon Sudzum v Stepan Pecak | 3-6,2-6 |
| ITF - M25 Pardubice | 2021/09/19 08:00 | Marcel Marlon Sudzum v Dean Thurner | 6-2,6-2 |
| ITF - M25 Sierre | 2021/08/29 10:10 | Manfredi Graziani v Marcel Marlon Sudzum | 6-4,6-3 |
| ITF - M25 Koksijde | 2021/08/17 15:25 | Gauthier Onclin v Marcel Marlon Sudzum | 6-1,7-6 |
| ITF - M25 Koksijde | 2021/08/16 08:00 | Idriss Haddouch v Marcel Marlon Sudzum | 2-6,5-7 |
| 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 - M25 Sarreguemines | 2021/10/25 11:15 | Hugo Pierre v Adan Freire Da Silva | 6-3,2-6,10-5 |
| ITF - M25 Sarreguemines | 2021/10/24 11:30 | Tim Loosen v Adan Freire Da Silva | 6-7,4-6 |
| ITF - M25 Plaisir | 2021/09/13 13:25 | Adan Freire Da Silva v Liova Ajavon | 6-2,6-7,9-11 |
| ITF - M25 Plaisir | 2021/09/13 07:55 | Hugo Pontico v Adan Freire Da Silva | 2-6,6-7 |
| ITF - M25 Plaisir | 2021/09/12 08:00 | Adan Freire Da Silva v Antoine Vincent | 6-4,6-1 |
| ITF - M25 Eupen | 2021/09/06 07:30 | Guillaume Dermiens v Adan Freire Da Silva | 7-6,6-1 |
| ITF - M25 Eupen | 2021/09/05 09:00 | Adan Freire Da Silva v Julian Peter | 6-1,6-2 |
| ITF - M15 Huy | 2021/08/23 15:30 | Adan Freire Da Silva v Elgin Khoeblal | 1-6,3-6 |