Stadium: Court 1 Round: 54 Ground: Carpet indoor
| ITF Germany F12 | 2018/08/15 15:00 | Dan Added v Kai Lemstra | 7-5,6-2 |
| ITF Slovakia F2 | 2018/07/31 07:00 | Kai Lemstra v Samuel Hodor | 4-6,2-6 |
| ITF Slovakia F2 | 2018/07/30 07:00 | Kai Lemstra v Daniel Rabas | 6-1,6-1 |
| ITF Slovakia F2 | 2018/07/29 07:00 | Kai Lemstra v Filip Kucbel | 6-1,6-1 |
| ITF Germany F9 | 2018/07/24 14:45 | Kai Lemstra v Christoph Negritu | 2-6,4-6 |
| ITF Germany F8 Qual | 2018/07/15 10:30 | Hamish Stewart v Kai Lemstra | 6-3,6-4 |
| ITF Germany F7 | 2018/07/10 11:35 | Alexis Klegou v Kai Lemstra | 6-7,6-4,6-3 |
| ITF Germany F7 | 2018/07/09 11:00 | Kai Lemstra v Hendrik Jebens | 4-6,6-1,4-6 |
| Challenger Prague | 2018/07/21 12:40 | Pawel Juszczak v Vitek Horak | 6-1,6-3 |
| ITF Czech Republic F3 Qual | 2018/05/27 08:00 | Kenneth Raisma v Vitek Horak | 6-4,6-3 |
| ITF Czech Republic F3 Qual | 2018/05/26 08:00 | Vitek Horak v Nikolas Lahky | 6-1,6-2 |