Stadium: Tennis King 3 Round: 44 Ground: Carpet indoor
| ITF Germany F1 | 2018/01/07 15:00 | Gabriel Schmidt v Karlo Cubelic | 5-7,3-6 |
| ITF Germany F1 | 2018/01/07 08:00 | Hendrik Jebens v Karlo Cubelic | 6-7,6-7 |
| ITF Germany F15 | 2017/10/15 12:00 | Jonas Trinker v Karlo Cubelic | 7-5,4-6,6-3 |
| ITF Germany F8 Qual | 2017/07/16 11:00 | Elmar Ejupovic v Karlo Cubelic | 6-0,6-4 |
| ITF Germany F4 | 2017/06/18 11:00 | Karlo Cubelic v Leonard Von Hindte | 2-6,2-6 |
| ITF Germany F2 Qual | 2017/01/16 09:00 | Karlo Cubelic v Daniel Czepielewski | 2-6,3-6 |
| ITF Germany F16 | 2016/10/24 08:00 | Karlo Cubelic v Arnd Weyhausen | 5-7,2-6 |
| ITF Germany F16 | 2016/10/23 07:30 | Karlo Cubelic v Henrik Traskin | 6-1,6-1 |
| ITF Germany F1 | 2018/01/07 11:30 | Tim Heger v Kai Lemstra | 4-6,4-6 |
| Challenger Eckental Qual | 2017/10/28 13:30 | Benjamin Hassan v Kai Lemstra | 7-5,7-6 |
| ITF Germany F16 | 2017/10/22 08:00 | Kai Lemstra v Tim Seibert | 3-6,1-6 |
| Challenger Ismaning Qual | 2017/10/15 12:20 | Kai Lemstra v Farrukh Dustov | 3-6,6-3,3-6 |
| Challenger Ismaning Qual | 2017/10/14 15:05 | Sven Lemstra v Kai Lemstra | 2-6,0-6 |
| ITF Germany F14 | 2017/10/12 10:00 | Sami Reinwein v Kai Lemstra | 3-6,6-2,6-4 |
| ITF Germany F14 | 2017/10/11 10:00 | Kai Lemstra v Danylo Kalenichenko | 6-4,6-3 |
| ITF Germany F12 | 2017/08/22 08:00 | Kai Lemstra v Robin Lang | 4-6,6-0,1-6 |