Estadio: Court 5 Round: 62 Ground: Clay
| ITF M25 Pardubice | 2023/09/18 08:00 | Jonas P Hartenstein v Matej Rudolf | 6-1,6-0 |
| ITF M15 Koszalin | 2023/09/06 09:25 | Jonas P Hartenstein v Maciej Rajski | 4-6,4-6 |
| ITF M15 Szczawno | 2023/09/01 09:00 | Olaf Pieczkowski v Jonas P Hartenstein | 6-2,6-2 |
| ITF M15 Szczawno | 2023/08/29 12:45 | Michal Mikula v Jonas P Hartenstein | 1-6,0-6 |
| ITF M25 Marburgo | 2023/07/05 09:00 | Alex Rybakov v Jonas P Hartenstein | 6-4,6-0 |
| ITF M25 Marburgo | 2023/07/04 08:00 | Jonas P Hartenstein v Martin Benes | 3-6,6-3,10-7 |
| ITF M25 Risskov/Aarhus | 2023/06/15 11:55 | Max Houkes v Jonas P Hartenstein | 6-7,6-4,6-3 |
| ITF M25 Risskov/Aarhus | 2023/06/14 10:40 | Olle Wallin v Jonas P Hartenstein | 2-6,4-6 |
| ITF M25 Pardubice | 2023/09/18 08:00 | Dominique Graf v Roman Postolka | 6-7,4-6 |
| ITF M25 Pardubice | 2023/09/17 10:30 | Martin Benes v Roman Postolka | 3-6,4-6 |
| ITF M25 Jablonec Nad Nisou | 2023/08/29 12:30 | Timo Stodder v Roman Postolka | 6-1,7-6 |
| ITF M15 Trier | 2023/08/21 09:30 | Roman Postolka v Jannik Maute | 3-6,6-7 |
| ITF M15 Kottingbrunn | 2023/08/14 12:00 | Tomas Lanik v Roman Postolka | 6-4,4-6,10-6 |
| ITF M15 Kottingbrunn | 2023/08/14 08:00 | Pietro R Scomparin v Roman Postolka | 2-6,1-6 |
| ITF M15 Kottingbrunn | 2023/08/13 08:00 | Pierre Antoine Tailleu v Roman Postolka | 4-6,2-6 |
| ITF M25 Poprad | 2023/06/22 08:00 | Roman Postolka v Vladyslav Orlov | 3-6,4-6 |