| ITF Poland F6 | 2018/08/11 10:00 | Jan Zielinski v Maciej Rajski | 5-7,1-6 |
| ITF Poland F4 | 2015/09/03 10:30 | Jan Zielinski v Maciej Rajski | 4-6,6-4,2-6 |
| Marbello Cup Exhibition Series | 2020/06/03 11:20 | Maciej Rajski v Filip Kolasinski | 4-6,7-5,3-10 |
| Marbello Cup Exhibition Series | 2020/06/02 15:15 | Maciej Rajski v Mateusz Terczynski | 4-6,6-4,10-4 |
| Marbello Cup Exhibition Series | 2020/06/02 11:15 | Maciej Rajski v Michal Dembek | 6-3,3-6,17-15 |
| ITF M15 Heraklion | 2020/02/16 09:15 | Mike Urbanija v Maciej Rajski | 6-4,6-2 |
| ITF M15 Heraklion | 2020/02/11 08:00 | Maciej Rajski v Lodewijk Weststrate | 4-6,2-6 |
| ITF M15 Heraklion | 2020/02/10 08:30 | Maciej Rajski v Marco Zocastello | 6-2,4-6,10-5 |
| ITF M15 Cairo | 2019/09/18 08:00 | Amr Asrawy v Maciej Rajski | 6-3,5-7,3-6 |
| ITF M15 Cairo | 2019/09/12 09:40 | Lenny Hampel v Maciej Rajski | 3-6,6-2,6-4 |
| Marbello Cup Exhibition Series | 2020/06/03 08:50 | Jan Zielinski v Michal Dembek | 7-6,5-7,10-4 |
| Marbello Cup Exhibition Series | 2020/06/02 13:30 | Daniel Michalski v Jan Zielinski | 6-0,5-7,8-10 |
| Marbello Cup Exhibition Series | 2020/06/02 07:00 | Jan Zielinski v Mateusz Terczynski | 4-6,6-3,10-6 |
| ITF M25 Sunderland | 2020/02/24 11:40 | Jan Zielinski v George Houghton | 4-6,6-3,7-10 |
| ITF M25 Sunderland | 2020/02/23 13:05 | Jan Zielinski v Harry Meehan | 4-6,6-4,11-9 |
| ITF M25 Glasgow | 2020/02/19 10:00 | Jan Zielinski v Antoine Bellier | 4-6,4-6 |
| ITF M25 Glasgow | 2020/02/17 14:25 | Jan Zielinski v Hendrik Jebens | 4-6,2-6 |
| ITF M25 Glasgow | 2020/02/16 17:40 | Jan Zielinski v Euan Mcintosh | 6-4,6-2 |