Stadium: Center Court Round: 26 Ground: Clay
| ITF Germany F13 | 2018/08/22 08:00 | Peter Heller v Jordi Walder | 7-6,6-3 |
| ITF Italy F23 | 2018/08/18 09:00 | Peter Heller v Jannik Sinner | 6-1,6-3 |
| ITF Italy F23 | 2018/08/17 09:00 | Peter Heller v Alexander Weis | 4-6,6-3,6-4 |
| ITF Italy F23 | 2018/08/16 09:00 | Peter Heller v Maxime Mora | 3-6,6-3,6-4 |
| ITF Italy F23 | 2018/08/15 07:30 | Peter Heller v Ignacio Monzon | 6-2,6-0 |
| ITF Italy F23 | 2018/08/14 10:15 | Peter Heller v Andres Gabriel Ciurletti | 6-2,6-0 |
| ITF Austria F4 | 2018/07/28 08:30 | Peter Heller v Thomas Statzberger | 7-5,6-2 |
| ITF Austria F4 | 2018/07/27 09:00 | Peter Heller v Yuta Shimizu | 6-4,7-6 |
| ITF Germany F13 | 2018/08/21 15:00 | Florian Fallert v Johannes Haerteis | 2-6,3-6 |
| Challenger Pullach Qual | 2018/08/04 15:55 | Alexandre Muller v Johannes Haerteis | 7-6,7-5 |
| Challenger Sopot Qual | 2018/07/29 09:00 | Roberto Marcora v Johannes Haerteis | 6-4,7-5 |
| Challenger Sopot Qual | 2018/07/28 10:40 | Johannes Haerteis v Kamil Gajewski | 6-3,6-2 |
| ITF Austria F3 | 2018/07/19 15:00 | Johannes Haerteis v Nerman Fatic | 2-6,6-7 |
| ITF Austria F3 | 2018/07/18 09:30 | Mariano Kestelboim v Johannes Haerteis | 2-6,7-5,2-6 |
| ITF Austria F3 | 2018/07/17 13:15 | Gabriel Huber v Johannes Haerteis | 2-6,1-6 |
| ITF Austria F2 | 2018/07/14 12:00 | Nerman Fatic v Johannes Haerteis | 1-6,6-3,6-1 |