| UTR Pro Tennis Series Amsterdam | 2021/12/11 07:00 | Aloys J W Van Baal v Niklas Koch | 6-4,6-4 |
| UTR Pro Tennis Series Amsterdam | 2021/12/10 08:30 | Deney Wassermann v Niklas Koch | 6-2,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/12/09 11:55 | Nathan De Veer v Niklas Koch | 6-1,6-5 |
| UTR Pro Tennis Series Amsterdam | 2021/12/07 10:00 | Yan Sabanin v Niklas Koch | 3-6,3-5 |
| UTR Pro Tennis Series Amsterdam | 2021/12/06 07:00 | Niklas Koch v Miko Wassermann | 6-4,6-7,3-6 |
| ITF M25 Eupen | 2021/09/06 11:00 | Buvaysar Gadamauri v Niklas Koch | 6-2,6-2 |
| ITF M25 Eupen | 2021/09/05 12:00 | Niklas Koch v Arslanbek Temirhanov | 6-1,6-2 |
| ITF M15 Manacor | 2020/01/12 11:30 | Billy Harris v Niklas Koch | 6-1,6-1 |