| UTR Pro Tennis Series Mulheim | 2021/10/13 10:00 | Jing L Weng v Tim Sandkaulen | 3-6,2-5 |
| UTR Pro Tennis Series Mulheim | 2021/10/12 08:30 | Jing L Weng v Yurii Dzhavakian | 5-7,6-1,6-3 |
| 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 10:00 | Colin Sinclair v Jing L Weng | 6-1,6-4 |
| UTR Pro Tennis Series Mulheim | 2021/09/24 13:30 | Jing L Weng v Oleksandr Bielinskyi | 1-6,6-3,1-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/22 11:00 | Jing L Weng v Julien De Cuyper | 6-1,5-4 |
| UTR Pro Tennis Series Mulheim | 2021/09/20 11:00 | Pablo Carretero v Jing L Weng | 2-6,6-3,6-6 |
| ITF M25 Eupen | 2021/09/06 09:15 | Jip Van Assendelft v Jing L Weng | 6-4,6-1 |
| UTR Pro Tennis Series Mulheim | 2021/10/14 10:00 | Yurii Dzhavakian v Constantin Schmitz | 4-6,5-7 |
| UTR Pro Tennis Series Mulheim | 2021/10/12 08:30 | Edison Ambarzumjan v Constantin Schmitz | 2-6,2-5 |
| 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 |