| 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 |
| ITF M15 Manacor | 2020/01/05 09:00 | Benjamin Pietri v Niklas Koch | 6-0,6-1 |
| ITF M15 Monastir | 2019/12/16 08:00 | Alessandro Coppini v Niklas Koch | 3-6,7-6,10-6 |
| ITF M15 Monastir | 2019/12/15 08:00 | Cheraag Bajwa v Niklas Koch | 6-7,6-4,8-10 |
| ITF M15 Monastir Qual | 2019/12/08 08:30 | Niklas Koch v Maik Steiner | 2-6,3-6 |
| ITF M15 Kaarst | 2019/02/04 08:30 | Martin Van Der Meerschen v Niklas Koch | 7-5,7-6 |
| UTR Pro Tennis Series Amsterdam | 2021/11/06 10:30 | Max Houkes v Miko Wassermann | 6-4,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/11/04 12:00 | Miko Wassermann v Lawrence Bataljin | 6-1,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/11/03 09:00 | Miko Wassermann v Jip Van Assendelft | 1-6,4-5 |
| UTR Pro Tennis Series Amsterdam | 2021/11/02 12:00 | Miko Wassermann v Johann Willems | 2-6,2-6 |
| UTR Pro Tennis Series Amsterdam | 2021/11/01 13:30 | Miko Wassermann v Guy Den Heijer | 2-6,5-7 |