Stadium: Court 1 Round: 28 Ground: Clay
| ITF Poland F4 | 2015/09/03 10:30 | Jan Zielinski v Maciej Rajski | 4-6,6-4,2-6 |
| ITF Poland F6 | 2018/08/10 10:00 | Pawel Juszczak v Jan Zielinski | 6-2,6-7,1-6 |
| ITF Poland F6 | 2018/08/08 11:00 | Jan Zielinski v Eduardo Dischinger | 6-3,6-3 |
| ITF Poland F6 | 2018/08/07 10:35 | Piotr Galus v Jan Zielinski | 3-6,5-7 |
| ITF Poland F6 Qual | 2018/08/06 08:00 | Max Steinberger v Jan Zielinski | 4-6,0-6 |
| ITF Poland F6 Qual | 2018/08/05 12:30 | Jan Zielinski v Norbert Tadyszak | 6-0,6-0 |
| ITF Poland F6 Qual | 2018/08/04 08:00 | Juliusz Bienkiewicz v Jan Zielinski | 3-6,3-6 |
| Challenger Sopot Qual | 2018/07/30 15:15 | Dimitar Kuzmanov v Jan Zielinski | 6-0,6-1 |
| Challenger Sopot Qual | 2018/07/30 09:00 | Jan Zielinski v Cristian Rodriguez | 7-5,6-3 |
| ITF Poland F6 | 2018/08/10 12:00 | Maciej Rajski v Vladyslav Orlov | 6-0,6-1 |
| ITF Poland F6 | 2018/08/09 14:50 | Maciej Rajski v Patryk Kosinski | 6-3,6-4 |
| ITF Poland F6 | 2018/08/07 13:10 | Maciej Rajski v Adam Mlazga | 6-1,6-3 |
| ITF Spain F20 | 2018/07/27 17:15 | Maciej Rajski v Carlos Lopez Montagud | 1-6,5-7 |
| ITF Spain F20 | 2018/07/26 10:25 | Maciej Rajski v Eduard Guell | 6-3,6-2 |
| ITF Spain F20 | 2018/07/24 08:00 | Maciej Rajski v Claudio Fortuna | 6-4,7-5 |
| ITF Spain F19 | 2018/07/20 16:10 | Marc Giner v Maciej Rajski | 6-7,7-6,6-2 |
| ITF Spain F19 | 2018/07/18 14:00 | Carlos Sanchez Jover v Maciej Rajski | 6-7,7-5,5-7 |