Stadium: Court 4 Round: 62 Ground: Clay
| 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 |
| ITF Germany F7 | 2018/07/09 08:00 | Kai Lemstra v Tim Handel | 4-6,7-5,6-1 |
| ITF Czech Republic F3 Qual | 2018/05/28 08:00 | Kai Lemstra v Dominik Recek | 2-6,2-6 |
| ITF Czech Republic F2 | 2018/05/22 08:00 | Kai Lemstra v Bart Van Den Berg | 3-6,3-6 |
| ITF Croatia F3 | 2018/03/22 11:30 | Kai Lemstra v Deni Zmak | 6-4,1-6,4-6 |
| ITF Slovakia F1 | 2018/07/22 08:00 | Marko Ilic v Filip Kucbel | 7-5,5-7,7-6 |
| ITF Slovakia F1 | 2018/07/21 08:00 | Dominik Hruncak v Filip Kucbel | 3-6,1-6 |
| ITF Austria F3 | 2018/07/14 12:30 | Filip Kucbel v Philipp Schroll | 3-6,0-6 |
| ITF Austria F3 | 2018/07/14 07:15 | Filip Kucbel v Alexander Schager | 6-1,6-0 |
| ITF Austria F1 | 2018/07/01 09:05 | Filip Kucbel v Luca Staeheli | 1-6,2-6 |
| ITF Austria F1 | 2018/06/30 07:00 | Filip Kucbel v Erwin Troebinger | 6-4,6-1 |
| ITF Czech Republic F4 Qual | 2018/06/23 10:00 | Filip Kucbel v Tomas Machac | 2-6,2-6 |
| ITF Hungary F4 Qual | 2018/06/10 08:00 | Filip Kucbel v Kristjan Tamm | 2-6,5-7 |