Stadium: Wisla Centrum 1 Round: 26 Ground: Clay
| ITF Poland F2 | 2018/05/08 08:00 | Jonathan Gray v Maciej Smola | 6-1,6-4 |
| Challenger Glasgow | 2018/05/01 10:45 | Harri Heliovaara v Jonathan Gray | 6-3,6-1 |
| ITF France F8 | 2018/04/25 09:00 | Jonathan Gray v Gregoire Jacq | 0-6,2-6 |
| ITF France F8 | 2018/04/23 16:30 | Robin Kern v Jonathan Gray | 3-6,2-6 |
| ITF Greece F5 | 2018/03/30 07:30 | Jonathan Gray v Yaraslav Shyla | 4-6,2-6 |
| ITF Greece F5 | 2018/03/29 10:35 | Jonathan Gray v Patrik Rikl | 6-4,6-0 |
| ITF Greece F5 | 2018/03/27 13:25 | Jonathan Gray v Anastasios Pavlis | 7-6,6-1 |
| ITF Greece F4 | 2018/03/23 14:55 | Jonathan Gray v Tomas Barrios Vera | 6-3,1-6,1-6 |
| ITF Poland F2 | 2018/05/08 09:30 | Daniel Kossek v Lukasz Kozielski | 2-6,6-1,6-4 |
| ITF Poland F1 | 2018/05/01 12:15 | Daniel Kossek v Piotr Grynkowski | 1-6,1-6 |
| 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 |