Stadium: Court 8 Round: 62 Ground: Clay
| ITF M25 Hammamet | 2024/04/07 09:00 | Marc Ros Mesas v Marcel Hornung | 7-6,6-4 |
| ITF M25 Hammamet | 2024/04/01 13:30 | Nico Hornitschek v Marcel Hornung | 6-2,6-3 |
| ITF M15 Monastir | 2024/03/24 09:30 | Marcel Hornung v Jack Karlsson Winstrand | 3-6,4-6 |
| ITF M25 Trimbach | 2024/03/11 16:45 | Marcel Hornung v Nicola Rispoli | 2-6,4-6 |
| ITF M15 Morelia | 2023/10/17 18:30 | Marcel Hornung v Johan A Rodriguez Rodriguez | 3-6,0-6 |
| ITF M25 Zapopan | 2023/10/09 16:00 | Marcel Hornung v Rodolfo Jauregui Sainz De Rozas | 4-6,2-6 |
| ITF M15 Buschhausen | 2023/09/11 08:00 | Marcel Hornung v Alen Moritz Hodzic | 1-6,2-6 |
| ITF M25 Oldenzaal | 2023/08/28 16:20 | Marcel Hornung v Leon Formella | 2-6,3-6 |
| ITF M15 Sharm El Sheikh | 2024/03/03 13:00 | Nyo Van Dyck v Niklas Grunewald | 7-5,6-2 |
| ITF M15 Sharm El Sheikh | 2024/02/25 08:00 | Niklas Grunewald v Rakhimbek Ibrakhimov | 2-6,0-6 |
| ITF M15 Sharm El Sheikh | 2024/02/21 11:15 | Niklas Grunewald v Michael Bassem Sobhy | 0-6,1-6 |
| ITF M15 Sharm El Sheikh | 2024/02/05 10:30 | Guy Den Heijer v Niklas Grunewald | 6-1,6-4 |
| ITF M15 Sharm El Sheikh | 2024/02/04 12:00 | Niklas Grunewald v Ilgiz Kamchibekov | 6-2,7-5 |
| ITF M15 Sharm El Sheikh | 2024/01/28 12:30 | Niklas Grunewald v Filiberto Fumagalli | 5-7,4-6 |
| ITF M25 Nussloch | 2024/01/21 08:30 | Niklas Grunewald v Gabriel Moroder | 5-7,4-6 |
| ITF M15 Sharm El Sheikh | 2023/12/05 08:00 | Lorenzo Lorusso v Niklas Grunewald | 6-3,6-2 |