Stadium: Court 1 Round: 26 Ground: Clay
| 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 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 Metzingen | 2023/07/25 11:00 | Juan C P Angelo v Daniel Salazar | 0-6,7-6,6-3 |
| ITF M15 Uslar | 2023/07/20 13:55 | Juan C P Angelo v Nicolas Zanellato | 6-4,2-6,3-6 |
| ITF M15 Uslar | 2023/07/19 09:55 | Juan C P Angelo v Justin Engel | 6-2,6-4 |
| Davis Cup | 2023/06/24 21:15 | Juan C P Angelo v Adolfo Daniel Vallejo | 6-7,6-7 |
| Davis Cup | 2023/06/23 19:35 | Juan C P Angelo v Ricardo Rodriguez-Pace | 6-3,7-6 |
| Davis Cup | 2023/06/21 19:15 | Juan C P Angelo v Luis Gomez | 6-0,6-0 |
| Davis Cup | 2023/06/20 19:45 | Juan C P Angelo v Daniel Phillips | 3-6,6-2,6-1 |
| ITF M15 Constanta | 2023/06/01 09:35 | Cezar Cretu v Juan C P Angelo | 6-3,6-2 |