Stadium: Court 1 Round: 26 Ground: Clay
| ITF M15 Antalya | 2023/04/20 07:00 | Dan Alexandru Tomescu v Johannes Haerteis | 1-6,6-4,2-6 |
| ITF M15 Constanta | 2023/06/01 08:00 | Dan Alexandru Tomescu v Petr Nesterov | 5-7,3-6 |
| ITF M15 Constanta | 2023/05/31 07:00 | Dan Alexandru Tomescu v Moerani Bouzige | 6-4,6-3 |
| ITF M15 Bucharest | 2023/05/26 07:55 | Florent Bax v Dan Alexandru Tomescu | 6-2,6-2 |
| ITF M15 Bucharest | 2023/05/25 09:45 | Dan Alexandru Tomescu v Vlad Andrei Dancu | 6-3,7-5 |
| ITF M15 Bucharest | 2023/05/24 08:45 | Mariano Tammaro v Dan Alexandru Tomescu | 3-6,7-6,6-7 |
| ITF M15 Pazardzhik | 2023/05/16 08:00 | Nicolas Buitrago v Dan Alexandru Tomescu | 6-4,6-7,7-6 |
| ITF M15 Kursumlijska Banja | 2023/04/26 08:00 | Dan Alexandru Tomescu v Sergei Pogosian | 4-6,2-6 |
| ITF M15 Antalya | 2023/04/20 07:00 | Dan Alexandru Tomescu v Johannes Haerteis | 1-6,6-4,2-6 |
| 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 Prague Qual | 2023/05/07 12:55 | Vitaliy Sachko v Johannes Haerteis | 5-7,6-2,6-1 |
| ITF M25 Sanxenxo | 2023/04/28 13:00 | Robert Strombachs v Johannes Haerteis | 7-6,6-4 |
| ITF M25 Sanxenxo | 2023/04/27 12:30 | Johannes Haerteis v Tao Mu | 6-4,6-1 |
| 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 |