Estadio: Pista 1 Round: 14 Ground: Clay
| Challenger de Murcia | 2021/09/28 09:00 | Mats Rosenkranz v Matteo Martineau | 6-0,6-4 |
| Challenger de Szczecin | 2021/09/14 10:00 | Marco Trungelliti v Matteo Martineau | 4-6,6-4,6-3 |
| Challenger de Szczecin | 2021/09/13 12:10 | Nicola Kuhn v Matteo Martineau | 6-4,6-1 |
| Challenger de Tulln | 2021/09/07 08:00 | Matteo Martineau v Jonas Forejtek | 2-6,6-7 |
| Challenger de Tulln | 2021/09/06 08:00 | Matteo Martineau v Mate Valkusz | 7-5,1-6,6-4 |
| Challenger de Tulln | 2021/09/05 09:00 | Matteo Martineau v Lenny Hampel | 6-3,6-2 |
| ITF M25 Lesa | 2021/08/29 14:50 | Alessandro Bega v Matteo Martineau | 5-7,6-2,2-6 |
| ITF M25 Lesa | 2021/08/27 19:00 | Jean Thirouin v Matteo Martineau | 1-6,1-6 |
| 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 M15 Esch-sur-Alzette | 2021/07/18 08:00 | Raphael Collignon v Marcel Marlon Sudzum | 6-4,6-4 |