Stadium: Wisla Centrum 2 Round: 27 Ground: Clay
| ITF Poland F2 | 2018/05/10 12:30 | Gray, Jonathan v Kossek, Daniel | 6-3,6-1 |
| ITF Poland F2 | 2018/05/08 08:00 | Gray, Jonathan v Smola, Maciej | 6-1,6-4 |
| Challenger - Glasgow | 2018/05/01 10:45 | Heliovaara, Harri v Gray, Jonathan | 6-3,6-1 |
| ITF France F8 | 2018/04/25 09:00 | Gray, Jonathan v Jacq, Gregoire | 0-6,2-6 |
| ITF France F8 | 2018/04/23 16:30 | Kern, Robin v Gray, Jonathan | 3-6,2-6 |
| ITF Greece F5 | 2018/03/30 07:30 | Gray, Jonathan v Shyla, Yaraslau | 4-6,2-6 |
| ITF Greece F5 | 2018/03/29 10:35 | Gray, Jonathan v Rikl, Patrik | 6-4,6-0 |
| ITF Greece F5 | 2018/03/27 13:25 | Gray, Jonathan v Pavlis, Anastasios | 7-6,6-1 |
| ITF Poland F2 | 2018/05/08 08:00 | Ratniuk, Maxim v Manole, Alexandru Vasile | 7-6,6-1 |
| Turkey F15, Singles Qualifying | 2018/04/16 07:30 | Ratniuk, Maxim v Taylor, Sam | 6-4,6-7,1-6 |
| Turkey F15, Singles Qualifying | 2018/04/14 07:30 | Ratniuk, Maxim v Sami Ben Abdennibi | 6-0,6-1 |
| Turkey F14, Singles Qualifying | 2018/04/10 07:30 | Genaro Alberto Olivieri v Ratniuk, Maxim | 7-6,6-3 |
| Turkey F14, Singles Qualifying | 2018/04/09 08:30 | Ratniuk, Maxim v Felipe Meligeni Rodrigues Alves | 6-2,6-3 |
| Turkey F14, Singles Qualifying | 2018/04/08 07:30 | Ratniuk, Maxim v Boerma, Pelle | 6-2,6-4 |
| Turkey F14, Singles Qualifying | 2018/04/07 09:30 | Ratniuk, Maxim v Allemby, James | 7-5,6-2 |
| ITF Russia F3 | 2018/03/15 08:25 | Roman Safiullin v Ratniuk, Maxim | 3-6,6-3,6-4 |