| 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 |
| 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 |
| ITF M15 Cairo | 2019/09/11 08:00 | Mauro De Maio v Maciej Rajski | 4-6,3-6 |
| ITF M15 Bratislava | 2019/08/30 08:00 | Maciej Rajski v Tomas Jirousek | 5-7,6-4,5-7 |
| ITF M15 Bratislava | 2019/08/29 08:00 | Maciej Rajski v Adrian Barbu | 6-4,7-6 |
| 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 |
| ITF M25 Barnstaple | 2020/02/13 11:20 | Kacper Zuk v Jan Zielinski | 3-6,6-0,6-1 |
| ITF M25 Barnstaple | 2020/02/12 13:05 | Jan Zielinski v Daniel Little | 6-3,6-4 |
| ITF M25 Barnstaple | 2020/02/11 13:25 | Alexis Gautier v Jan Zielinski | 6-4,6-7,4-6 |