Stadium: Court 2 Round: 26 Ground: Clay
| ITF M15 Litija | 2023/06/14 15:35 | Luca Wiedenmann v Jaka Tomazin | 6-0,6-1 |
| ITF M15 Nyiregyhaza | 2023/06/10 10:00 | Peter Fajta v Luca Wiedenmann | 6-2,7-6 |
| ITF M15 Nyiregyhaza | 2023/06/09 12:00 | Tomas Farjat v Luca Wiedenmann | 3-6,3-6 |
| ITF M15 Nyiregyhaza | 2023/06/08 09:00 | Luca Wiedenmann v Bor Artnak | 6-7,6-1,6-4 |
| ITF M15 Nyiregyhaza | 2023/06/07 11:00 | Luca Wiedenmann v Karol Filar | 6-2,6-2 |
| ITF M25 Jablonec Nad Nisou | 2023/05/31 08:00 | Lukas Neumayer v Luca Wiedenmann | 6-4,6-4 |
| ITF M25 Jablonec Nad Nisou | 2023/05/30 07:55 | Luca Wiedenmann v Jakub Novak | 6-0,7-5 |
| ITF M25 Jablonec Nad Nisou | 2023/05/29 08:00 | Luca Wiedenmann v Mark Wallner | 6-4,6-3 |
| ITF M15 Litija | 2023/06/14 12:10 | Nikola Basic v Olaf Pieczkowski | 0-6,2-6 |
| ITF M15 Constanta | 2023/06/01 08:00 | Radu Mihai Papoe v Olaf Pieczkowski | 6-1,6-4 |
| ITF M15 Constanta | 2023/05/30 10:35 | Joao Victor C Loureiro v Olaf Pieczkowski | 4-6,6-1,4-6 |
| ITF M15 Pazardzhik | 2023/05/24 14:00 | Leonardo Rossi v Olaf Pieczkowski | 7-6,7-6 |
| ITF M15 Monastir | 2023/03/22 08:30 | Olaf Pieczkowski v Buvaysar Gadamauri | 2-6,6-3,2-6 |
| ITF M15 Monastir | 2023/03/19 08:30 | Olaf Pieczkowski v Lorenzo Rottoli | 6-7,3-6 |
| ITF M15 Monastir | 2023/03/18 10:15 | Simone Roncalli v Olaf Pieczkowski | 2-6,2-6 |
| ITF M15 Monastir | 2023/03/17 11:00 | Olaf Pieczkowski v Szymon Kielan | 6-1,6-1 |