Stadium: Wisla Centrum 2 Round: 27 Ground: Clay
| ITF Poland F2 | 2018/05/10 12:30 | Jonathan Gray v Daniel Kossek | 6-3,6-1 |
| 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 Poland F2 | 2018/05/08 08:00 | Maxim Ratniuk v Alexandru Vasile Manole | 7-6,6-1 |
| ITF Turkey F15 | 2018/04/16 07:30 | Maxim Ratniuk v Sam Taylor | 6-4,6-7,1-6 |
| ITF Turkey F15 | 2018/04/14 07:30 | Maxim Ratniuk v Sami Ben Abdennibi | 6-0,6-1 |
| ITF Turkey F14 | 2018/04/10 07:30 | Genaro Alberto Olivieri v Maxim Ratniuk | 7-6,6-3 |
| ITF Turkey F14 | 2018/04/09 08:30 | Maxim Ratniuk v Felipe Meligeni Rodrigues Alves | 6-2,6-3 |
| ITF Turkey F14 | 2018/04/08 07:30 | Maxim Ratniuk v Pelle Boerma | 6-2,6-4 |
| ITF Turkey F14 | 2018/04/07 09:30 | Maxim Ratniuk v James Allemby | 7-5,6-2 |
| ITF Russia F3 | 2018/03/15 08:25 | Roman Safiullin v Maxim Ratniuk | 3-6,6-3,6-4 |