| ITF M25 Brussels | 06/24 08:00 | - | Lenn Luemkemann v Kylian Collignon | 6-2,3-6,0-1 | |
| ITF M25 Brussels | 06/23 08:00 | - | Sydney Zick v Lenn Luemkemann | 3-6,4-6 | |
| ITF M25 Brussels | 06/22 08:00 | - | Joshua Nuyts v Lenn Luemkemann | 2-6,0-6 | |
| ITF M15 Lambermont | 08/18 14:25 | 44 | Lenn Luemkemann v Eliott Costa | 3-6,4-6 | |
| German Championship | 12/08 14:00 | - | Kai Wehnelt v Lenn Luemkemann | 6-3,4-6,6-2 | |
| German Championship | 12/06 15:00 | - | Lukas Maskow v Lenn Luemkemann | 1-6,3-6 |