Stadium: Banco Carregosa Round: 19 Ground: Hardcourt outdoor
| Challenger - Porto | 2023/07/30 10:00 | Antoine Hoang v Hugo Maia | 6-2,4-6,4-6 |
| ITF - M25 Porto | 2023/07/26 16:35 | Julio Cesar Porras v Hugo Maia | 6-1,6-0 |
| ITF - M25 Castelo Branco | 2023/07/16 09:00 | Ricardo Villacorta-Alonso v Hugo Maia | 6-4,6-3 |
| ITF - M15 Monastir | 2023/07/03 12:30 | Tomas Luis v Hugo Maia | 7-5,6-0 |
| ITF - M15 Monastir | 2023/07/03 08:30 | Dharmil Shah v Hugo Maia | 5-7,4-6 |
| ITF - M15 Monastir | 2023/07/02 08:30 | Marco Franzini v Hugo Maia | 3-6,2-6 |
| ITF - M15 Monastir | 2023/06/25 10:30 | Vladislav Melnic v Hugo Maia | 6-4,6-2 |
| ITF - M25 Idanha-A-Nova | 2022/07/21 08:00 | Hugo Maia v Rio Noguchi | 4-6,2-6 |
| Challenger - Porto | 2023/07/30 10:00 | Johannes Haerteis v Victor Lilov | 6-4,2-6,6-2 |
| ITF - M25 Porto | 2023/07/27 11:45 | Johannes Haerteis v Joao Domingues | 6-2,6-7,2-6 |
| ITF - M25 Porto | 2023/07/26 11:35 | Tomas Pinho v Johannes Haerteis | 4-6,6-7 |
| ITF - M15 Cluj Napoca | 2023/06/22 06:50 | Johannes Haerteis v Gabi Adrian Boitan | 2-6,3-6 |
| ITF - M15 Cluj Napoca | 2023/06/21 09:10 | Dan Alexandru Tomescu v Johannes Haerteis | 4-6,2-6 |
| ITF - M15 Cluj Napoca | 2023/06/20 06:25 | Johannes Haerteis v Mihai Alexandru Coman | 6-4,7-6 |
| ITF - M15 Vaasa | 2023/06/07 12:45 | Johannes Haerteis v Iiro Vasa | 4-6,1-6 |
| Challenger - Praga - Calificari | 2023/05/07 12:55 | Vitaliy Sachko v Johannes Haerteis | 5-7,6-2,6-1 |