| UTR Pro Tennis Series Mulheim | 2021/10/11 07:00 | Edison Ambarzumjan v Jing L Weng | 1-6,1-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/25 07:00 | Pablo Carretero v Edison Ambarzumjan | 6-4,6-2 |
| UTR Pro Tennis Series Mulheim | 2021/09/24 08:00 | Edison Ambarzumjan v Artem Podorozhnyi | 1-6,3-5 |
| UTR Pro Tennis Series Mulheim | 2021/09/22 12:30 | Edison Ambarzumjan v Jurriaan Bol | 6-4,2-6,2-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/21 08:00 | Edison Ambarzumjan v Christos Keisidis | 6-2,4-6,5-1 |
| UTR Pro Tennis Series Mulheim | 2021/09/20 09:30 | Colin Sinclair v Edison Ambarzumjan | 7-5,5-4 |
| UTR Pro Tennis Series Mulheim | 2021/10/11 07:00 | Constantin Schmitz v Tim Sandkaulen | 6-4,7-5 |
| ITF M15 Allershausen | 2021/08/31 11:25 | Constantin Schmitz v Mick Veldheer | 6-7,4-6 |
| ITF M25 Trier | 2021/08/26 09:30 | Constantin Schmitz v Ryan Nijboer | 4-6,2-6 |
| ITF M25 Trier | 2021/08/25 11:40 | Mats Rosenkranz v Constantin Schmitz | 1-6,1-6 |
| ITF M15 Oldenzaal | 2021/08/19 12:35 | Constantin Schmitz v Luke Johnson | 7-5,0-6,3-6 |
| ITF M15 Oldenzaal | 2021/08/18 14:10 | Constantin Schmitz v Zachary Eisinga | 6-3,7-6 |
| ITF M25 Wetzlar | 2021/08/06 15:55 | Constantin Schmitz v Peter Heller | 3-6,7-5,1-6 |
| ITF M25 Wetzlar | 2021/08/05 13:55 | Dayne Kelly v Constantin Schmitz | 2-6,1-6 |