| UTR Pro Tennis Series Bucharest | 2021/11/30 12:30 | Stefan Palosi v Johann Willems | 2-6,3-6 |
| UTR Pro Tennis Series Amsterdam | 2021/11/06 15:00 | Johann Willems v Mikhail Minakov | 2-5 |
| UTR Pro Tennis Series Amsterdam | 2021/11/05 13:30 | Guy Den Heijer v Johann Willems | 7-6,2-6,6-4 |
| UTR Pro Tennis Series Amsterdam | 2021/11/04 12:00 | Jip Van Assendelft v Johann Willems | 3-6,2-5 |
| 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 | Johann Willems v Lawrence Bataljin | 6-1,5-1 |
| UTR Pro Tennis Series Mulheim | 2021/10/17 08:30 | Johann Willems v Christian Hansen | 6-1,5-1 |
| UTR Pro Tennis Series Mulheim | 2021/10/16 08:15 | Constantin Schmitz v Johann Willems | 3-6,1-6 |
| UTR Pro Tennis Series Zadar | 2021/11/21 12:00 | Egor Matvievici v Alexander Lazov | 5-4 |
| UTR Pro Tennis Series Zadar | 2021/11/20 12:30 | Ivan Mikhaylyuk v Alexander Lazov | 3-6,6-7 |
| UTR Pro Tennis Series Zadar | 2021/11/19 13:50 | Ivan Penev v Alexander Lazov | 6-3,3-6,3-6 |
| UTR Pro Tennis Series Zadar | 2021/11/18 12:00 | Deni Zmak v Alexander Lazov | 6-3,6-7,5-3 |
| UTR Pro Tennis Series Zadar | 2021/11/16 10:30 | Jose A R Rodriguez v Alexander Lazov | 1-6,2-6 |
| UTR Pro Tennis Series Zadar | 2021/11/14 15:20 | Graham Maassen v Alexander Lazov | 6-2,6-4 |
| UTR Pro Tennis Series Brasov | 2021/10/30 09:30 | Stefan A Andreescu v Alexander Lazov | 6-3,7-5 |
| UTR Pro Tennis Series Brasov | 2021/10/29 10:00 | Yurii Dzhavakian v Alexander Lazov | 6-2,6-4 |