Stadium: Hortkorn Court Round: 19 Ground: Clay
| ITF M25 Nussloch | 2024/01/23 18:00 | Vincent Marysko v Lasse Poertner | 6-3,6-4 |
| ITF M15 Cadolzburg | 2024/01/16 11:40 | Lasse Poertner v Stepan Baum | 6-3,4-6,1-6 |
| ITF M15 Doha | 2023/10/09 18:00 | Lasse Poertner v Koray Kirci | 6-3,4-6,2-6 |
| ITF M15 Uberlingen | 2023/08/18 10:00 | Lasse Poertner v Jakob Schnaitter | 2-6,4-6 |
| ITF M15 Uberlingen | 2023/08/17 10:50 | Lasse Poertner v Illya Beloborodko | 6-4,3-6,6-3 |
| ITF M15 Frankfurt Am Main | 2023/08/08 09:00 | Lasse Poertner v Florian Broska | 5-7,1-6 |
| ITF M15 Eindhoven | 2023/08/01 09:55 | Elmer Moller v Lasse Poertner | 6-3,6-0 |
| ITF M15 Metzingen | 2023/07/26 15:35 | Lasse Poertner v Nicola Kuhn | 6-7,2-6 |
| ITF M25 Nussloch | 2024/01/25 17:45 | Max Hans Rehberg v Louis Wessels | 6-2,7-5 |
| ITF M25 Nussloch | 2024/01/24 16:55 | Maurus Malgiaritta v Louis Wessels | 3-6,6-7 |
| ITF M25 Esch/Alzette | 2024/01/04 11:10 | Louis Wessels v Kylian Collignon | 4-6,6-3,6-7 |
| ITF M25 Esch/Alzette | 2024/01/03 16:25 | Louis Wessels v Simon Beaupain | 2-6,6-3,6-4 |
| ITF M25 Mumbai | 2023/11/25 05:00 | Ramkumar Ramanathan v Louis Wessels | 7-6,6-3 |
| ITF M25 Mumbai | 2023/11/24 04:30 | S D Prajwal Dev v Louis Wessels | 4-6,3-6 |
| ITF M25 Mumbai | 2023/11/23 06:30 | Yuichiro Inui v Louis Wessels | 4-6,6-7 |
| ITF M25 Mumbai | 2023/11/22 03:30 | Seita Watanabe v Louis Wessels | 4-6,5-7 |