Stadium: Court 7 Round: 25 Ground: Clay
| ITF M15 Metzingen | 2023/07/28 10:50 | Kai Lemstra v Sander Jong | 6-3,0-6,2-6 |
| ITF M15 Metzingen | 2023/07/27 15:00 | Kai Lemstra v Juan Carlos Prado Angelo | 7-5,6-0 |
| ITF M15 Metzingen | 2023/07/26 12:30 | Stefanos Sakellaridis v Kai Lemstra | 3-6,3-6 |
| ITF M15 Tanger | 2023/06/08 11:00 | Kai Lemstra v Constantin Bittoun Kouzmine | 3-6,3-6 |
| ITF M15 Tanger | 2023/06/07 14:00 | Maik Steiner v Kai Lemstra | 1-6,5-7 |
| 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 Frankfurt Am Main | 2023/08/07 08:00 | Facundo Yunis v Mika Lipp | 6-4,6-4 |
| ITF M15 Metzingen | 2023/07/24 12:00 | Giuseppe La Vela v Mika Lipp | 6-4,6-3 |
| ITF M15 Metzingen | 2023/07/23 14:00 | Michalis Sakellaridis v Mika Lipp | 2-6,3-6 |
| ITF M25 Marburg | 2023/07/06 09:00 | Timo Stodder v Mika Lipp | 6-0,7-5 |
| ITF M25 Marburg | 2023/07/05 10:30 | Illya Beloborodko v Mika Lipp | 3-6,3-6 |
| ITF M25 Marburg | 2023/07/04 07:50 | Mika Lipp v Oren Vasser | 6-2,6-1 |
| ITF M25 Marburg | 2023/07/03 08:00 | Alessio Vasquez v Mika Lipp | 6-3,6-7,9-11 |
| ITF M15 Monastir | 2023/06/11 10:00 | Mika Lipp v Jay Friend | 1-6,5-7 |