Stadium: Court 5 Round: 26 Ground: Hardcourt outdoor
| ITF Tunisia F30 | 2018/09/04 09:00 | Christian Seraphim v Pedro Munafo | 6-1,6-2 |
| ITF Tunisia F30 | 2018/09/03 11:30 | Christian Seraphim v Stefan Palosi | 6-2,6-4 |
| ITF Tunisia F30 | 2018/09/02 14:00 | Christian Seraphim v Kuzey Cekirge | 6-2,6-3 |
| Challenger Pullach Qual | 2018/08/04 12:10 | Alen Avidzba v Christian Seraphim | 6-3,6-4 |
| ITF Germany F9 | 2018/07/23 10:00 | Christian Seraphim v Constantin Schmitz | 3-6,4-6 |
| ITF Germany F9 | 2018/07/22 15:30 | Christian Seraphim v Oscar Moraing | 6-4,7-6 |
| ITF Germany F9 | 2018/07/22 08:00 | Daniel Kopeinigg v Christian Seraphim | 4-6,3-6 |
| ITF Austria F3 | 2018/07/14 07:15 | Edward Hubner v Christian Seraphim | 6-2,5-7,7-5 |
| ITF Tunisia F30 | 2018/09/05 09:00 | Jakob Groener v Luke Johnson | 5-7,2-6 |
| ITF Italy F25 | 2018/08/29 12:00 | Sami Reinwein v Luke Johnson | 6-4,6-4 |
| ITF Italy F25 | 2018/08/27 12:00 | Daniil Zarichanskiy v Luke Johnson | 0-6,3-6 |
| ITF Ireland F1 | 2018/08/01 08:30 | Conor Berg v Luke Johnson | 4-6,6-3,6-2 |
| Challenger Granby Qual | 2018/07/22 21:30 | Wishaya Trongcharoenchaikul v Luke Johnson | 4-6,6-4,6-3 |
| Challenger Granby Qual | 2018/07/21 18:20 | Dan Martin v Luke Johnson | 3-6,6-7 |
| Challenger Gatineau Qual | 2018/07/15 01:05 | Luke Johnson v Takanyi Garanganga | 4-6,4-6 |
| Challenger Winnipeg Qual | 2018/07/08 15:00 | Jeffrey John Wolf v Luke Johnson | 6-3,6-1 |