Stadium: Ustron 2 Round: 25 Ground: Clay
| ITF Turkey F14 | 2018/04/07 09:30 | Daniel Kossek v Felipe Meligeni Rodrigues Alves | 0-6,0-6 |
| ITF Tunisia F9 | 2018/03/06 11:05 | Francois-Arthur Vibert v Daniel Kossek | 6-0,6-1 |
| ITF Tunisia F8 | 2018/02/25 11:00 | Alen Rogic-Hadzalic v Daniel Kossek | 6-1,7-6 |
| ITF Tunisia F8 | 2018/02/24 11:30 | Michael Kerschbaumer v Daniel Kossek | 4-6,5-7 |
| ITF Tunisia F7 | 2018/02/17 10:30 | Daniel Kossek v Adam Jones | 3-6,2-6 |
| ITF South Africa F3 Qual | 2017/12/04 09:20 | Milen Ianakiev v Daniel Kossek | 6-3,6-2 |
| ITF South Africa F3 Qual | 2017/12/03 13:30 | Vasilios Caripi v Daniel Kossek | 4-6,6-4,5-7 |
| ITF South Africa F2 Qual | 2017/11/25 06:30 | Joubert Klopper v Daniel Kossek | 7-6,6-2 |
| ITF Poland F1 | 2018/04/30 07:00 | Dominik Recek v Piotr Grynkowski | 6-4,3-6,5-7 |
| ITF Poland F1 | 2018/04/29 07:00 | Duje Ajdukovic v Piotr Grynkowski | 6-3,5-7,3-6 |
| ITF Czech Republic F11 Qual | 2017/11/19 09:00 | Grzegorz Panfil v Piotr Grynkowski | 7-6,6-3 |
| ITF Czech Republic F8 Qual | 2017/10/30 11:00 | Tadeas Paroulek v Piotr Grynkowski | 6-2,5-7,6-3 |
| ITF Czech Republic F7 Qual | 2017/10/24 08:00 | Lukas Vejvara v Piotr Grynkowski | 6-3,6-4 |
| ITF Czech Republic F7 Qual | 2017/10/23 08:00 | Pavel Motl v Piotr Grynkowski | 5-7,2-6 |
| Challenger Szczecin Qual | 2017/09/09 14:10 | Piotr Grynkowski v Guillermo Duran | 4-6,2-6 |
| ITF Poland F11 | 2017/08/28 09:00 | Piotr Grynkowski v Adam Chadaj | 4-6,1-6 |