Round: 25 Ground: Clay
| 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 Turkey F11 | 2015/03/18 07:30 | Zhizhen Zhang v Jan Zielinski | 6-4,6-2 |
| ITF Turkey F11 | 2015/03/16 08:00 | Jan Zielinski v Peter Vajda | 7-5,4-6,6-2 |
| ITF Turkey F11 | 2015/03/16 07:30 | Jan Zielinski v James Allemby | 6-1,6-2 |
| ITF Egypt F33 | 2015/02/08 08:00 | Dan Dowson v Jan Zielinski | 7-6,6-2 |
| ITF Lithuania F1 | 2015/07/24 08:00 | Pawel Juszczak v Ronald Slobodchikov | 6-4,1-6,6-7 |
| ITF Lithuania F1 | 2015/07/23 07:00 | Yaraslav Shyla v Pawel Juszczak | 6-7,2-6 |
| ITF Lithuania F1 | 2015/07/22 07:00 | Baptiste Crepatte v Pawel Juszczak | 4-6,3-6 |
| ITF Lithuania F1 | 2015/07/20 07:00 | Maciej Rajski v Pawel Juszczak | 2-6,6-7 |
| ITF Czech Republic F5 | 2015/06/30 11:25 | Martin Blasko v Pawel Juszczak | 6-4,6-2 |
| ITF Georgia F2 | 2015/06/06 07:00 | Marco Bortolotti v Pawel Juszczak | 6-4,6-4 |
| ITF Georgia F2 | 2015/06/05 06:30 | Pawel Juszczak v Pedro Sakamoto | 4-6,6-4,6-2 |
| ITF Georgia F2 | 2015/06/04 12:10 | Pawel Juszczak v Aleksandre Bakshi | 6-7,7-5,6-3 |