Round: 25 Ground: Clay
| ITF Germany F4 | 2017/06/22 15:00 | Milan Drinic v Haerteis, Johannes | 6-2,6-1 |
| Czech Republic F2, Singles | 2017/05/27 11:55 | Lenz, Julian v Haerteis, Johannes | 6-1,6-4 |
| Czech Republic F2, Singles | 2017/05/26 10:30 | Matuszewski, Piotr v Haerteis, Johannes | 3-6,1-6 |
| Czech Republic F2, Singles | 2017/05/25 09:00 | Panfil, Grzegorz v Haerteis, Johannes | 1-6,5-7 |
| Czech Republic F2, Singles | 2017/05/24 09:00 | Haerteis, Johannes v Niels Lootsma | 6-3,6-1 |
| ITF Czech Republic F1 Qual | 2017/05/15 10:45 | Haerteis, Johannes v Pavel Kotov | 6-4,4-6,4-6 |
| ITF Qatar F2 | 2017/04/12 13:10 | Haerteis, Johannes v Antoine Escoffier | 4-6,2-6 |
| ITF Qatar F2 | 2017/04/11 18:15 | Shyla, Yaraslau v Haerteis, Johannes | 1-6,2-6 |