Stadium: Court McDonalds Round: 14 Ground: Hardcourt outdoor
| 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 - Prag - Kvalifikation | 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 - Porto | 2023/07/27 10:00 | Alexandre Reco v Victor Lilov | 6-4,1-6,6-3 |
| ITF M25 - Porto | 2023/07/25 13:30 | Victor Lilov v Arthur Fery | 6-2,6-3 |
| ITF M25 - Castelo Branco | 2023/07/21 11:20 | Guillaume Dalmasso v Victor Lilov | 7-6,6-3 |
| ITF M25 - Castelo Branco | 2023/07/20 10:45 | Nicolas H Cuesta v Victor Lilov | 3-6,6-7 |
| ITF M25 - Castelo Branco | 2023/07/18 08:30 | Tomas Luis v Victor Lilov | 3-6,1-6 |
| ITF M25 - Roda de Bara | 2023/07/14 14:00 | Cem Ilkel v Victor Lilov | 6-2,6-3 |
| ITF M25 - Roda de Bara | 2023/07/13 16:30 | Victor Lilov v Sascha Gueymard Wayenburg | 6-4,6-0 |
| ITF M25 - Roda de Bara | 2023/07/12 11:45 | Mario G Fernandez v Victor Lilov | 6-3,3-6,4-6 |