Stadium: Court 6 Round: 25 Ground: Clay
| 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 |
| ITF M15 Antalya | 2023/04/18 09:50 | Johannes Haerteis v Arthur Reymond | 6-4,6-2 |
| ITF M15 Selva Gardena | 2022/10/31 13:40 | Tommaso Compagnucci v Mihai Alexandru Coman | 6-2,6-2 |
| ITF M15 Curtea de Arges | 2022/08/10 07:45 | Mihai Alexandru Coman v Dragos N Cazacu | 4-6,3-6 |
| ITF M25 Pitesti | 2022/08/03 07:45 | Vasile Antonescu v Mihai Alexandru Coman | 6-1,6-2 |
| ITF M25 Pitesti | 2022/08/01 07:50 | Charles Minc v Mihai Alexandru Coman | 2-6,2-6 |
| ITF M25 Pitesti | 2022/07/31 08:00 | Mihai Alexandru Coman v Mihai Razvan Marinescu | 6-3,7-6 |
| ITF M25 Bacau | 2022/07/28 08:45 | Mihai Alexandru Coman v Oliver Crawford | 0-6,3-6 |
| ITF M25 Bacau | 2022/07/27 08:50 | Gian M Di Natale v Mihai Alexandru Coman | 2-6,4-6 |
| Challenger Bucharest | 2021/09/19 12:25 | Raul Brancaccio v Mihai Alexandru Coman | 6-3,6-1 |