Stadium: Court 13 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Grasse | 2023/06/11 08:30 | Theo Herrmann v Thomas Kostka | 6-2,6-4 |
| ITF M15 Monastir | 2023/03/13 15:00 | Thomas Kostka v Zoran Ludoski | 3-6,2-6 |
| ITF M15 Monastir | 2023/03/13 08:30 | Linang Xiao v Thomas Kostka | 4-6,7-5,7-10 |
| ITF M25 Grasse | 2022/06/12 12:55 | Yann Marti v Thomas Kostka | 6-2,6-2 |
| ITF M15 Frankfurt Am Main | 2023/08/07 08:00 | Michael Agwi v Markus Malaszszak | 6-1,6-3 |
| ITF M25 Wetzlar | 2023/08/03 07:55 | Tim Handel v Markus Malaszszak | 6-3,6-1 |
| ITF M25 Wetzlar | 2023/08/01 13:10 | Markus Malaszszak v Jeremy Schifris | 6-3,6-4 |
| ITF M15 Metzingen | 2023/07/23 07:30 | Dawid Wisniewski v Markus Malaszszak | 3-6,1-6 |
| ITF M25 Marburg | 2023/07/03 08:00 | Markus Malaszszak v Anthony Genov | 3-6,6-7 |
| German Championship | 2022/12/08 12:00 | Markus Malaszszak v Lewie Lane | 3-6,2-6 |