Stadium: Court 1 Round: 27 Ground: Clay
| ITF Germany F12 | 2017/08/25 11:00 | Peter Heller v Matthias Haim | 3-6,1-6 |
| 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 Austria F4 | 2018/07/25 11:30 | Peter Heller v Michael Vrbensky | 7-6,7-6 |
| ITF Austria F4 | 2018/07/24 08:00 | Peter Heller v Gorazd Srbljak | 6-3,6-2 |
| ITF Austria F2 | 2018/07/13 10:00 | Peter Heller v Nerman Fatic | 6-7,6-3,2-6 |
| ITF Austria F2 | 2018/07/12 11:15 | Peter Heller v Lukas Ollert | 6-3,6-2 |
| ITF Austria F2 | 2018/07/11 09:00 | Peter Heller v Filip Duda | 3-6,7-6,6-1 |
| ITF Austria F2 | 2018/07/09 10:30 | Peter Heller v Philip Aplienz | 6-2,6-2 |
| Challenger Cordenons | 2018/08/11 10:30 | Elmar Ejupovic v Matthias Haim | 6-2,6-2 |
| ATP Kitzbuhel Qual | 2018/07/28 12:10 | Matthias Haim v Lorenzo Sonego | 7-6,3-6,4-6 |
| ITF Austria F4 | 2018/07/27 09:00 | Matthias Haim v Thomas Statzberger | 1-6,0-6 |
| ITF Austria F4 | 2018/07/26 09:00 | Alexander Erler v Matthias Haim | 4-6,2-6 |
| ITF Austria F4 | 2018/07/25 08:00 | Frederik Press v Matthias Haim | 4-6,5-7 |
| ITF Austria F4 | 2018/07/23 10:00 | Peter Goldsteiner v Matthias Haim | 7-5,4-6,6-7 |
| ITF Austria F3 | 2018/07/18 15:05 | Alexander Shevchenko v Matthias Haim | 6-4,7-5 |
| ITF Austria F3 | 2018/07/17 15:55 | Bjorn Nareyka v Matthias Haim | 0-6,4-6 |