Stadium: Court 5 Round: 25 Ground: Clay
| ITF M15 Tanger | 2023/06/06 09:00 | Maik Steiner v Lorenzo Vatteroni | 6-3,6-1 |
| ITF M15 Krsko | 2023/05/19 09:50 | Maik Steiner v Mirza Basic | 3-6,3-6 |
| ITF M15 Krsko | 2023/05/18 08:00 | Maik Steiner v Tomas Lanik | 6-2,7-5 |
| ITF M15 Antalya | 2023/05/04 07:20 | Maik Steiner v Peter Benjamin Privara | 6-4,4-6,4-6 |
| ITF M15 Antalya | 2023/05/02 10:30 | Sidane Pontjodikromo v Maik Steiner | 3-6,5-7 |
| ITF M15 Antalya | 2023/04/18 07:00 | Gabriel Donev v Maik Steiner | 6-2,4-6,12-10 |
| ITF M15 Antalya | 2023/04/17 09:25 | Lior Goldenberg v Maik Steiner | 0-6,6-7 |
| ITF M15 Antalya | 2023/04/16 07:00 | Radovan Michalik v Maik Steiner | 3-6,6-7 |
| ITF M15 Constanta | 2023/05/30 11:00 | Simon A Ivanov v Kai Lemstra | 6-2,6-2 |
| ITF M15 Warmbad-Villach | 2023/05/23 07:30 | Kai Lemstra v Giovanni Oradini | 3-6,6-7 |
| ITF M15 Warmbad-Villach | 2023/05/22 08:00 | Kai Lemstra v Igor Dudun | 6-1,6-2 |
| ITF M15 Warmbad-Villach | 2023/05/21 10:00 | Kai Lemstra v Ivan Kremenchutskyi | 6-1,6-0 |
| ITF M15 Telde | 2023/04/22 09:00 | Kai Lemstra v Marcel Zielinski | 2-6,4-6 |
| ITF M15 Telde | 2023/04/21 09:00 | Kai Lemstra v Ignacio Buse | 6-4,6-2 |
| ITF M15 Telde | 2023/04/20 10:30 | Alberto Barroso Campos v Kai Lemstra | 5-7,6-3,1-6 |
| ITF M15 Telde | 2023/04/19 11:00 | Noah Lopez v Kai Lemstra | 6-7,4-6 |