Stadium: Court 8 Round: 62 Ground: Clay
| ITF M25 Kramsach | 2023/07/23 07:00 | Piotr Kusiewicz v Adam Blecha | 6-2,6-3 |
| ITF M15 Wroclaw | 2023/06/25 09:00 | Aleksander Orlikowski v Piotr Kusiewicz | 6-3,6-2 |
| ITF M15 Nyiregyhaza | 2023/06/05 10:30 | Ivan Kremenchutskyi v Piotr Kusiewicz | 6-3,6-2 |
| ITF M15 Constanta | 2023/05/28 10:00 | Borys Zgola v Piotr Kusiewicz | 6-2,6-3 |
| ITF M25 Trnava | 2023/03/28 09:45 | Dominik Recek v Piotr Kusiewicz | 6-4,6-3 |
| ITF M25 Trnava | 2023/03/27 13:00 | Lukas Janousek v Piotr Kusiewicz | 4-6,1-6 |
| ITF M15 Rovinj | 2023/03/12 09:00 | Obrad Markovski v Piotr Kusiewicz | 6-3,6-2 |
| ITF M15 Porec | 2023/03/05 11:30 | Tim Heger v Piotr Kusiewicz | 6-3,7-5 |
| ITF M25 Telfs | 2023/07/17 12:00 | Francesco Ferrari v Elias Sumann | 6-2,6-0 |
| ITF M25 Telfs | 2023/07/17 07:00 | Elias Sumann v Luca Matteo Sobbe | 3-6,7-6,11-9 |