Stadium: Court 7 Round: 14 Ground: Clay
| Challenger Bratislava | 2021/11/07 09:30 | Marvin Moeller v Christopher Heyman | 7-6,6-4 |
| Challenger Eckental | 2021/11/02 09:00 | Marc-Andrea Huesler v Christopher Heyman | 6-1,6-1 |
| Challenger Eckental | 2021/11/01 10:00 | Mischa Zverev v Christopher Heyman | 3-6,6-3,2-6 |
| Challenger Eckental | 2021/10/31 10:00 | Aldin Setkic v Christopher Heyman | 4-6,5-7 |
| 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 |