Stadium: Center Court(3) Round: 29 Ground: Clay
| 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 |
| ITF - M25 Esch/Alzette | 2023/07/22 12:00 | Chris Rodesch v Marlon Vankan | 6-7,5-7 |
| ITF - M25 Esch/Alzette | 2023/07/21 11:20 | Marlon Vankan v Robin Catry | 6-3,6-4 |
| ITF - M25 Esch/Alzette | 2023/07/20 11:10 | Federico Agustin Gomez v Marlon Vankan | 7-6,6-7,1-6 |
| ITF - M15 Eupen | 2023/08/12 12:15 | Peter Heller v Marc Majdandzic | 5-7,1-6 |
| ITF - M15 Eupen | 2023/08/11 16:30 | Luca Wiedenmann v Marc Majdandzic | 4-6,7-5,3-6 |
| ITF - M15 Eupen | 2023/08/10 17:00 | Pierre Yves Bailly v Marc Majdandzic | 6-3,4-6,1-6 |
| ITF - M15 Eupen | 2023/08/09 12:20 | Marc Majdandzic v Jose Pereira | 4-6,6-1,7-6 |
| Challenger - Braunschweig | 2023/07/09 14:15 | Marc Majdandzic v Denis Yevseyev | 3-6,4-6 |
| ITF - M15 Kamen | 2023/06/29 08:50 | Tom Gentzsch v Marc Majdandzic | 6-3,4-6,7-6 |
| ITF - M15 Kamen | 2023/06/27 09:00 | Marc Majdandzic v Kody Pearson | 6-4,6-3 |