Stadium: Centre Court Round: 27 Ground: Clay
| ITF M25 Montauban | 2023/06/22 09:25 | Marlon Vankan v Jahn, Jeremy | 1-6,2-6 |
| ITF M25 Koksijde | 2023/08/17 10:10 | Jahn, Jeremy v Alexis Boureau | 6-1,6-1 |
| ITF M25 Koksijde | 2023/08/15 16:00 | Jahn, Jeremy v Nicolas Bruna | 6-2,6-2 |
| ITF M25 Bolzano | 2023/08/03 11:25 | Jahn, Jeremy v Giovanni Oradini | 3-6,1-6 |
| ITF M25 Bolzano | 2023/08/02 11:20 | Jahn, Jeremy v Maurus Malgiaritta | 6-4,6-2 |
| ITF M25 Bolzano | 2023/08/01 09:25 | Jahn, Jeremy v Scomparin, Pietro Romeo | 6-1,6-1 |
| Challenger Karlsruhe | 2023/07/02 09:00 | Oriol Roca Batalla v Jahn, Jeremy | 2-6,6-1,7-5 |
| ITF M15 Kamen | 2023/06/29 11:00 | Jahn, Jeremy v Hynek Barton | 4-6,4-6 |
| ITF M15 Kamen | 2023/06/27 10:45 | Jahn, Jeremy v David Fix | 6-2,6-4 |
| ITF M25 Koksijde | 2023/08/17 11:25 | Gilles Arnaud Bailly v Marlon Vankan | 4-6,5-7 |
| ITF M25 Koksijde | 2023/08/15 16:55 | Marlon Vankan v Tibo Colson | 6-4,6-4 |
| ITF M15 Eupen | 2023/08/13 13:00 | Marlon Vankan v Marc Majdandzic | 7-5,7-6 |
| ITF M15 Eupen | 2023/08/12 15:00 | Simon Beaupain v Marlon Vankan | 6-7,1-6 |
| ITF M15 Eupen | 2023/08/10 11:30 | Stijn Slump v Marlon Vankan | 3-6,1-6 |
| ITF M15 Eupen | 2023/08/09 11:35 | Alexis Boureau v Marlon Vankan | 1-6,1-6 |
| ITF M15 Eindhoven | 2023/08/01 11:30 | Marlon Vankan v Niels Visker | 6-7,3-6 |
| ITF M25 Esch/Alzette | 2023/07/23 13:00 | Alex Knaff v Marlon Vankan | 6-3,6-1 |