Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Sanxenxo | 2023/04/26 10:00 | Johannes Haerteis v Grigory Kuklin | 6-1,6-0 |
| ITF M15 Antalya | 2023/04/21 07:30 | Dragos Nicolae Madaras v Johannes Haerteis | 6-2,6-2 |
| ITF M15 Antalya | 2023/04/20 07:00 | Dan Alexandru Tomescu v Johannes Haerteis | 1-6,6-4,2-6 |
| ITF M15 Antalya | 2023/04/18 09:50 | Johannes Haerteis v Arthur Reymond | 6-4,6-2 |
| ITF M15 Antalya | 2023/04/12 07:00 | Daniele Capecchi v Johannes Haerteis | 4-6,6-3,6-2 |
| ITF M25 Trento | 2023/03/30 15:00 | Giovanni Oradini v Johannes Haerteis | 6-4,6-0 |
| ITF M25 Trento | 2023/03/29 07:30 | Aliaksandr Bulitski v Johannes Haerteis | 2-6,2-6 |
| Challenger Biel | 2023/03/19 15:05 | Francesco Forti v Johannes Haerteis | 4-6,6-4,7-5 |
| ITF M25 Sanxenxo | 2023/04/25 10:40 | Ignacio B Alia v Tao Mu | 2-6,3-6 |
| ITF M15 Monastir | 2023/03/24 08:20 | Tao Mu v Maxence Beauge | 5-7,6-7 |
| ITF M15 Monastir | 2023/03/23 11:15 | Tao Mu v Nicolas Philibert | 6-7,7-6,6-1 |
| ITF M15 Monastir | 2023/03/22 12:30 | Tao Mu v Daniil Ostapenkov | 6-4,6-3 |
| ITF M15 Monastir | 2023/03/12 08:30 | Florent Bax v Tao Mu | 6-2,6-4 |
| ITF M15 Monastir | 2023/03/11 08:30 | Tao Mu v Lorenzo Carboni | 6-2,6-1 |
| ITF M15 Monastir | 2023/03/10 10:45 | Ray Ho v Tao Mu | 6-4,5-7,5-7 |
| ITF M15 Monastir | 2023/03/09 10:30 | Renta Tokuda v Tao Mu | 3-6,3-6 |