| UTR Pro Tennis Series Mulheim | 2021/09/20 11:00 | Carretero, Pablo v Weng, Jing Long | 2-6,6-3,6-6 |
| ITF M25 Eupen | 2021/09/06 09:15 | Jip Van Assendelft v Weng, Jing Long | 6-4,6-1 |
| ITF M25 Eupen | 2021/09/05 10:30 | Kylian Collignon v Weng, Jing Long | 0-6,1-6 |
| ITF M15 Oldenzaal | 2021/08/15 12:00 | Weng, Jing Long v Karlo Cubelic | 3-6,1-6 |
| ITF M25 Marburg | 2021/07/05 12:25 | Weng, Jing Long v Raphael Collignon | 2-6,6-3,8-10 |
| ITF M25 The Hague | 2021/06/27 08:00 | Guy Den Heijer v Weng, Jing Long | 6-3,6-4 |
| ITF - M15 Antalya | 2021/05/09 07:00 | Weng, Jing Long v Tryakshin, Mark | 2-6,5-7 |
| ITF - M15 Antalya | 2021/05/02 06:00 | Melnic, Vladislav v Weng, Jing Long | 6-4,6-0 |
| ITF M25 Plaisir | 2021/09/12 07:55 | Ajavon, Liova v Julien De Cuyper | 3-6,6-2,10-6 |
| UTR Pro Tennis Series Sofia | 2021/09/01 09:30 | Ianakiev, Milen v Julien De Cuyper | 6-3,5-1 |
| UTR Pro Tennis Series Sofia | 2021/08/31 09:30 | Dzhavakian, Yurii v Julien De Cuyper | 6-0,5-0 |
| UTR Pro Tennis Series Sofia | 2021/08/30 11:30 | Julien De Cuyper v Lazov, Alexander | 2-6,2-5 |
| UTR Pro Tennis Series Portoroz | 2021/08/28 08:30 | Dusan Trunic v Julien De Cuyper | 3-0 |
| UTR Pro Tennis Series Portoroz | 2021/08/27 12:00 | Julien De Cuyper v Dahiya, Paras | 6-1,4-6,6-4 |
| UTR Pro Tennis Series Portoroz | 2021/08/26 07:00 | Julien De Cuyper v Gal Emersic Potocnik | 1-6,0-5 |
| ITF M15 Pescara | 2021/08/16 07:15 | Julien De Cuyper v Spinnato, Daniele | 1-6,3-6 |