| ITF Tunisia F22 | 2018/06/06 13:00 | Luca Gelhardt v Geronimo E Busleiman | 4-6,2-6 |
| ITF Turkey F21 | 2018/05/30 09:00 | Luca Gelhardt v Marsel Ilhan | 6-3,3-6,4-6 |
| ITF Turkey F20 Qual | 2018/05/24 09:15 | Luca Gelhardt v Nicolas Alberto Arreche | 3-6,3-6 |
| ITF Turkey F20 | 2018/05/22 07:30 | Moritz Thiem v Luca Gelhardt | 3-6,0-6 |
| ITF Turkey F19 | 2018/05/16 07:00 | Luca Gelhardt v Juan Pablo Varillas | 6-7,3-6 |
| ITF Poland F2 | 2018/05/09 09:40 | Luca Gelhardt v Marvin Netuschil | 5-7,5-7 |
| ITF Poland F2 | 2018/05/07 11:00 | David Poljak v Luca Gelhardt | 4-6,2-6 |
| ITF Poland F1 | 2018/05/03 09:00 | Luca Gelhardt v Pascal Meis | 3-6,3-6 |
| ITF Spain F15 | 2018/06/17 09:30 | Clement Geens v Sumit Sarkar | 7-5,7-5 |
| ITF Spain F15 | 2018/06/16 17:00 | Pablo Vivero Gonzalez v Clement Geens | 5-7,4-6 |
| ITF Spain F15 | 2018/06/14 15:00 | John Echeverria v Clement Geens | 2-6,1-6 |
| ITF Spain F15 | 2018/06/13 15:00 | Alberto Barroso Campos v Clement Geens | 3-6,6-3,2-6 |
| ITF Spain F15 Qual | 2018/06/11 08:00 | Clement Geens v Javier Molino | 6-3,6-4 |
| ITF Spain F15 Qual | 2018/06/10 11:30 | Clement Geens v Angel G Melgar | 7-5,6-1 |
| Challenger Poznan Qual | 2018/06/04 09:25 | Lukas Rosol v Clement Geens | 4-6,2-6 |
| Challenger Poznan Qual | 2018/06/03 14:15 | Clement Geens v Joao Pedro Sorgi | 0-6,6-4,6-2 |