Stadium: Court 1 Oberhaching Round: 44 Ground: Hardcourt indoor
| ITF M25 Barnstaple | 2020/02/09 14:30 | Kai Lemstra v Henry Patten | 5-7,2-6 |
| ITF M15 Sharm El Sheikh | 2019/11/14 08:00 | Vladyslav Manafov v Kai Lemstra | 6-1,6-2 |
| ITF M15 Sharm El Sheikh | 2019/11/13 08:00 | Tsung-Hao Huang v Kai Lemstra | 6-7,2-6 |
| ITF M15 Sharm El Sheikh | 2019/11/05 08:00 | Kalman Boyd v Kai Lemstra | 7-5,6-4 |
| ITF M15 Sharm El Sheikh | 2019/11/04 08:00 | Martin Dobry v Kai Lemstra | 3-6,3-6 |
| ITF M15 Sharm El Sheikh | 2019/10/29 08:00 | Timur Kiyamov v Kai Lemstra | 6-3,7-6 |
| ITF M15 Sharm El Sheikh | 2019/10/28 09:00 | Daniel Kossek v Kai Lemstra | 1-6,1-6 |
| ITF M15 Bad Salzdetfurth | 2019/10/08 09:00 | Kai Lemstra v Christopher Patzanovsky | 6-7,4-6 |
| ITF M15 Sharm El Sheikh | 2020/02/09 10:00 | Victor Ernaelsteen v Dominik Langmajer | 4-6,6-3,10-8 |
| ITF M15 Sharm El Sheikh | 2020/02/02 08:00 | Alec Beckley v Dominik Langmajer | 6-4,6-3 |
| ITF M25 Nussloch | 2020/01/19 09:00 | Niklas Albuszies v Dominik Langmajer | 6-4,6-4 |
| ITF M15 Monastir | 2020/01/13 10:30 | Luke Johnson v Dominik Langmajer | 6-2,6-1 |
| ITF M15 Monastir | 2020/01/12 13:30 | Dominik Langmajer v Zhansultan Chembotayev | 6-1,6-3 |
| ITF M15 Monastir | 2020/01/05 09:00 | Louis Allen v Dominik Langmajer | 7-6,7-5 |
| ITF M15 Milovice | 2019/11/13 16:25 | Dominik Langmajer v Jan Satral | 4-6,2-6 |
| ITF M15 Opava | 2019/10/28 11:00 | Federico Arnaboldi v Dominik Langmajer | 7-5,7-6 |