stadio: Court 4 Round: 26 Ground: Clay
| ITF M15 Szczawno | 2023/08/29 12:45 | Michal Mikula v Jonas P Hartenstein | 1-6,0-6 |
| ITF M25 Marburg | 2023/07/05 09:00 | Alex Rybakov v Jonas P Hartenstein | 6-4,6-0 |
| ITF M25 Marburg | 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 Jablonec Nad Nisou | 2023/05/30 10:15 | Peter Goldsteiner v Jonas P Hartenstein | 7-5,7-5 |
| ITF M25 Jablonec Nad Nisou | 2023/05/29 09:00 | Patrik Oplustil v Jonas P Hartenstein | 3-6,0-6 |
| ITF M25 Jablonec Nad Nisou | 2023/05/28 13:00 | Mikolaj Lis v Jonas P Hartenstein | 1-6,2-6 |
| ITF M15 Szczawno | 2023/08/30 14:10 | Valerio Perruzza v Szymon Kielan | 6-1,6-1 |
| ITF M15 Trier | 2023/08/24 11:00 | Valerio Perruzza v Yvo Panak | 6-7,5-7 |
| ITF M15 Trier | 2023/08/22 11:00 | Valerio Perruzza v Joao Antonio | 6-4,6-0 |
| ITF M15 Hyvinkaa | 2023/08/04 08:35 | Iiro Vasa v Valerio Perruzza | 6-7,6-1,6-0 |
| ITF M15 Hyvinkaa | 2023/08/03 11:00 | Valerio Perruzza v Gabriele Maria Noce | 7-5,6-4 |
| ITF M15 Hyvinkaa | 2023/08/01 07:00 | Valerio Perruzza v Hermanni Tiainen | 6-0,6-1 |
| ITF M15 Hyvinkaa | 2023/07/31 09:30 | Valerio Perruzza v Martins Rocens | 6-2,6-1 |
| ITF M25 Bacau | 2023/07/27 07:55 | Valerio Perruzza v Radu Mihai Papoe | 0-6,2-6 |