Stadium: Court 7 Round: 62 Ground: Clay
| 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/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 M15 Zilina | 2021/08/30 11:30 | Stepan Pecak v Jakub Novak | 7-6,1-6,9-11 |
| ITF M25 Wetzlar | 2021/08/03 09:00 | Daniel Cukierman v Stepan Pecak | 6-1,6-1 |
| ITF M25 Wetzlar | 2021/08/02 08:00 | Stepan Pecak v Loic Cloes | 6-4,4-6,10-8 |
| ITF M25 Wroclaw | 2021/06/27 12:30 | Szymon Kielan v Stepan Pecak | 4-6,6-4,10-8 |
| ITF M15 Antalya | 2021/06/13 07:30 | Thiago Cigarran v Stepan Pecak | 6-2,3-6,10-2 |
| ITF M15 Antalya | 2021/06/06 07:30 | Edouard Villoslada v Stepan Pecak | 6-0,6-0 |
| ITF M25 Most | 2021/05/23 14:00 | Stepan Pecak v Roman Postolka | 4-6,1-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/17 10:00 | Titouan Droguet v Stepan Pecak | 6-0,6-1 |