Stadium: Court 4 Round: 25 Ground: Hardcourt indoor
| Challenger Sibiu | 2018/09/16 10:35 | Haerteis, Johannes v Lenz, Julian | 4-6,4-6 |
| Challenger Sibiu | 2018/09/15 07:30 | Vit Kopriva v Haerteis, Johannes | 4-6,1-6 |
| ITF Romania F13 | 2018/09/13 06:30 | Haerteis, Johannes v Hidalgo, Gabriel Alejandro | 4-6,5-7 |
| ITF Romania F13 | 2018/09/11 06:30 | Haerteis, Johannes v Gabi Adrian Boitan | 6-3,6-2 |
| ITF Germany F13 | 2018/08/23 08:00 | Peter Heller v Haerteis, Johannes | 6-1,6-0 |
| ITF Germany F13 | 2018/08/21 15:00 | Fallert, Florian v Haerteis, Johannes | 2-6,3-6 |
| Challenger Pullach Qual | 2018/08/04 15:55 | Alexandre Muller v Haerteis, Johannes | 7-6,7-5 |
| Challenger Sopot Qual | 2018/07/29 09:00 | Marcora, Roberto v Haerteis, Johannes | 6-4,7-5 |
| ITF Spain F28 | 2018/09/19 09:55 | Ouahab, Lamine v Fred Simonsson | 7-6,7-6 |
| ITF Italy F26 | 2018/09/05 08:40 | Fred Simonsson v Torebko, Peter | 7-5,2-6,1-6 |
| ITF Italy F26 | 2018/09/04 09:30 | Fred Simonsson v Nystroem, Patrick | 6-1,6-1 |
| ITF Italy F25 | 2018/08/31 16:00 | Fred Simonsson v Reinwein, Sami | 6-7,4-6 |
| ITF Italy F25 | 2018/08/30 14:05 | Laurent Lokoli v Fred Simonsson | 2-6,6-7 |
| ITF Italy F25 | 2018/08/29 14:00 | Procopio, Alessandro v Fred Simonsson | 2-6,3-6 |
| ITF Italy F25 | 2018/08/28 12:00 | Fred Simonsson v Borroni, Andrea | 7-5,6-2 |
| ITF Finland F3 | 2018/08/14 09:10 | Carr, Simon v Fred Simonsson | 7-6,6-4 |