Stadium: Court 2 Oberhaching Round: 26 Ground: Hardcourt indoor
| ITF M15 Oberhaching | 2024/02/13 10:00 | Mujakic, Alen v Lasse Poertner | 4-6,1-6 |
| Nussloch, Singles M-ITF-GER-01A | 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 키르시, 코라이 | 6-3,4-6,2-6 |
| ITF M15 Ueberlingen | 2023/08/18 10:00 | Lasse Poertner v Schnaitter, Jakob | 2-6,4-6 |
| ITF M15 Ueberlingen | 2023/08/17 10:50 | Lasse Poertner v 벨로보로드코, 일리아 | 6-4,3-6,6-3 |
| ITF M15 Frankfurt Am Main | 2023/08/08 09:00 | Lasse Poertner v Broska, Florian | 5-7,1-6 |
| ITF M15 Eindhoven | 2023/08/01 09:55 | Moller, Elmer v Lasse Poertner | 6-3,6-0 |
| ITF M15 Oberhaching | 2024/02/13 11:50 | Justin Engel v Tom Gentzsch | 1-6,2-6 |
| Koblenz, Germany | 2024/01/31 11:00 | Tom Gentzsch v 라마신, 트리스탄 | 0-6,2-6 |
| Nussloch, Singles M-ITF-GER-01A | 2024/01/28 12:55 | 마주어, 다니엘 v Tom Gentzsch | 6-1,6-3 |
| Nussloch, Singles M-ITF-GER-01A | 2024/01/27 15:10 | 나우, 하젬 v Tom Gentzsch | 6-7,6-3,3-6 |
| Nussloch, Singles M-ITF-GER-01A | 2024/01/26 13:10 | Tom Gentzsch v Rehberg, Max Hans | 6-2,4-6,6-4 |
| Nussloch, Singles M-ITF-GER-01A | 2024/01/25 14:35 | Tom Gentzsch v 헤이노넨, 아담 | 6-3,6-4 |
| Nussloch, Singles M-ITF-GER-01A | 2024/01/24 17:30 | 로센크란즈, 매츠 v Tom Gentzsch | 6-7,3-6 |
| ITF M15 Cadolzburg | 2024/01/19 12:00 | Rehberg, Max Hans v Tom Gentzsch | 7-6,6-2 |