Stadium: Court T13 Round: 26 Ground: Clay
| ITF M25 Madrid | 2023/09/13 11:00 | Johannes Haerteis v Herbert Jody Maginley | 6-4,7-5 |
| Challenger - Cassis | 2023/09/03 10:40 | Charles Broom v Johannes Haerteis | 6-3,7-6 |
| ITF M15 Allershausen | 2023/08/31 14:55 | Johannes Haerteis v Nicola Kuhn | 5-7,3-6 |
| ITF M15 Allershausen | 2023/08/30 15:10 | Johannes Haerteis v Luca Hesselmann | 2-6,6-1,6-4 |
| ITF M25 Ystad | 2023/08/16 08:45 | Valentin Vacherot v Johannes Haerteis | 6-2,6-7,6-4 |
| ITF M15 Frankfurt Am Main | 2023/08/11 12:50 | Lucas Gerch v Johannes Haerteis | 7-5,6-0 |
| ITF M15 Frankfurt Am Main | 2023/08/10 10:55 | Kai Lemstra v Johannes Haerteis | 7-5,4-6,2-6 |
| Challenger Porto | 2023/08/01 16:10 | Johannes Haerteis v Emilio Nava | 6-7,6-7 |
| ITF M25 Madrid | 2023/09/13 08:00 | Jaime Caldes v Daniel Merida Aguilar | 2-6,1-6 |
| ITF M25 Oldenzaal | 2023/08/31 10:15 | Daniel Merida Aguilar v Justin Roberts | 7-6,4-6,5-7 |
| ITF M25 Oldenzaal | 2023/08/30 07:55 | Daniel Merida Aguilar v Tom Schonenberg | 7-6,6-3 |
| Challenger Praha | 2023/08/20 09:35 | Daniel Merida Aguilar v Pawel Juszczak | 4-6,2-6 |
| Challenger Todi | 2023/08/13 10:25 | Gian M Di Natale v Daniel Merida Aguilar | 7-6,6-3 |
| ITF M25 Denia | 2023/07/27 13:50 | Vilius Gaubas v Daniel Merida Aguilar | 1-6,7-6,6-3 |
| ITF M25 Denia | 2023/07/25 14:00 | Vicente O Moratalla v Daniel Merida Aguilar | 4-6,2-6 |
| ITF M25 Gandia | 2023/07/20 08:00 | Daniel Merida Aguilar v Pedro Rodenas | 4-6,5-7 |