Round: 27 Ground: Clay
| ITF Poland F4 Qual | 2015/08/31 08:00 | Samuel Hodor v Jan Zielinski | 5-7,1-6 |
| ITF Poland F2 | 2015/08/16 08:00 | Denis Merkulov v Jan Zielinski | 4-6,2-6 |
| ITF Poland F1 | 2015/08/13 10:00 | Adria Mas Mascolo v Jan Zielinski | 7-5,7-6 |
| ITF Poland F1 | 2015/08/11 11:50 | Jan Zielinski v Pawel Juszczak | 3-6,6-4,6-3 |
| ITF Czech Republic F6 Qual | 2015/07/05 08:00 | Jan Zielinski v Jan Poskocil | 3-6,2-6 |
| ITF Czech Republic F5 Qual | 2015/06/28 09:00 | Jan Zielinski v Pawel Zawisza | 5-7,7-6,4-6 |
| ITF Georgia F2 | 2015/06/09 06:00 | Jan Zielinski v Igor Saveljic | 2-6,6-3,2-6 |
| ITF Turkey F12 | 2015/03/21 09:00 | Matteo Berrettini v Jan Zielinski | 6-3,6-2 |
| ITF Poland F4 | 2015/09/02 11:00 | Maciej Rajski v Robin Stanek | 6-4,2-6,6-4 |
| ITF Poland F4 | 2015/09/01 09:45 | Petr Michnev v Maciej Rajski | 5-7,2-6 |
| ITF Poland F4 Qual | 2015/08/31 08:00 | Maciej Rajski v Karol Krawczynski | 6-2,6-2 |
| ITF Poland F3 | 2015/08/25 12:40 | Andrea Basso v Maciej Rajski | 3-6,6-3,6-4 |
| ITF Poland F3 Qual | 2015/08/24 09:50 | Maciej Rajski v Kamil Gajewski | 6-1,6-2 |
| ITF Poland F2 | 2015/08/21 13:25 | Maciej Rajski v Axel Michon | 2-6,3-6 |
| ITF Poland F2 | 2015/08/20 13:20 | Petr Michnev v Maciej Rajski | 5-7,4-6 |
| ITF Poland F2 | 2015/08/18 09:50 | Maciej Rajski v Bartosz Wojnar | 6-3,7-5 |