Stadium: Court 1 Round: 14 Ground: Carpet indoor
| Challenger Losinj | 2021/10/20 08:00 | Aldin Setkic v Mathias Bourgue | 0-6,2-6 |
| Challenger Losinj | 2021/10/18 10:00 | Aldin Setkic v Anthony Genov | 6-3,6-4 |
| ITF M25 Skopje | 2021/10/02 09:30 | Aldin Setkic v Louis Wessels | 2-6,7-6,3-6 |
| ITF M25 Skopje | 2021/10/01 13:00 | Aldin Setkic v Andrey Chepelev | 6-4,6-4 |
| ITF M25 Skopje | 2021/10/01 07:30 | Aldin Setkic v Giorgio Tabacco | 6-4,6-3 |
| ITF M25 Skopje | 2021/09/29 11:50 | Aldin Setkic v Jumpei Yamasaki | 7-5,6-4 |
| ITF M15 Pirot | 2021/09/25 08:00 | Aldin Setkic v Federico Iannaccone | 6-3,3-6,7-6 |
| ITF M15 Pirot | 2021/09/24 08:00 | Aldin Setkic v David Jorda Sanchis | 6-4,6-4 |
| ITF M25 Nevers | 2021/10/06 13:00 | Christopher Heyman v Luca Van Assche | 4-6,6-7 |
| Challenger Lisbon | 2021/09/26 10:45 | Christopher Heyman v Lucas Gerch | 4-6,7-6,5-7 |
| Challenger Biel | 2021/09/19 09:30 | Jakub Paul v Christopher Heyman | 7-6,4-6,7-5 |
| Challenger Istanbul | 2021/09/16 08:00 | Yasutaka Uchiyama v Christopher Heyman | 3-6,6-3,6-4 |
| Challenger Istanbul | 2021/09/14 08:40 | Christopher Heyman v Andrea Arnaboldi | 3-6,6-2,6-4 |
| Challenger Istanbul | 2021/09/13 07:30 | Geoffrey Blancaneaux v Christopher Heyman | 4-6,4-6 |
| Challenger Istanbul | 2021/09/12 08:00 | Artem Dubrivnyy v Christopher Heyman | 3-6,2-6 |
| Challenger Warsaw | 2021/08/23 09:00 | Christopher Heyman v Daniel Michalski | 5-7,3-6 |