| UTR Pro Tennis Series California | 2021/11/08 20:30 | Nicholas Heng v Corrado Summaria | 6-0,6-1 |
| UTR Pro Tennis Series Nevada | 2021/06/26 16:45 | Colton Smith v Nicholas Heng | 6-3,5-4 |
| UTR Pro Tennis Series Nevada | 2021/06/24 16:30 | Nicholas Heng v Alfredo Perez | 6-4,4-6,3-6 |
| UTR Pro Tennis Series Nevada | 2021/06/23 16:30 | Nicholas Heng v Nicolas Barrientos | 3-6,2-6 |
| UTR Pro Tennis Series Nevada | 2021/06/22 18:00 | Nicholas Heng v Kyle Kang | 5-7,3-6 |
| UTR Pro Tennis Series Nevada | 2021/06/21 15:00 | Nicholas Heng v Alexander Stater | 0-6,6-3,6-3 |
| UTR Pro Tennis Series California | 2021/05/27 16:30 | Connor Farren v Nicholas Heng | 6-2,5-4 |
| UTR Pro Tennis Series California | 2021/05/26 18:00 | Nicholas Heng v JC Aragone | 4-6,5-6 |
| UTR Pro Tennis Series California | 2021/11/08 17:30 | Arthur Bellegy v Maciej Rajski | 4-6,2-5 |
| ITF M25 Calabasas | 2021/10/27 17:00 | Rinky Hijikata v Maciej Rajski | 6-4,6-1 |
| ITF M15 Platja D'Aro | 2021/10/05 08:30 | Maciej Rajski v Lorenzo Joaquin Rodriguez | 3-6,6-3,9-11 |
| ITF M15 Platja D'Aro | 2021/10/04 11:00 | Maciej Rajski v Edas Butvilas | 6-2,3-6,12-10 |
| ITF M15 Platja D'Aro | 2021/10/03 09:30 | Maciej Rajski v Alberto Nieto | 6-1,6-2 |
| ITF M25 Pardubice | 2021/09/23 12:45 | Maciej Rajski v Tim Handel | 5-7,6-4,7-5 |
| ITF M25 Pardubice | 2021/09/22 10:20 | Martin Krumich v Maciej Rajski | 7-6,3-6,6-7 |
| Challenger Szczecin | 2021/09/13 09:00 | Alexey Vatutin v Maciej Rajski | 5-7,6-3,6-4 |