Stadium: Center Court Round: 54 Ground: Clay
| Cordenons, Italy | 2018/08/11 10:30 | Elmar Ejupovic v Haim, Matthias | 6-2,6-2 |
| Kitzbühel, Autriche, Qualifications | 2018/07/28 12:10 | Haim, Matthias v Lorenzo Sonego | 7-6,3-6,4-6 |
| ITF Austria F4 | 2018/07/27 09:00 | Haim, Matthias v Statzberger, Thomas | 1-6,0-6 |
| ITF Austria F4 | 2018/07/26 09:00 | Erler, Alexander v Haim, Matthias | 4-6,2-6 |
| ITF Austria F4 | 2018/07/25 08:00 | Press, Frederik v Haim, Matthias | 4-6,5-7 |
| ITF Austria F4 | 2018/07/23 10:00 | Goldsteiner, Peter v Haim, Matthias | 7-5,4-6,6-7 |
| ITF Austria F3 | 2018/07/18 15:05 | Alexander Shevchenko v Haim, Matthias | 6-4,7-5 |
| ITF Austria F3 | 2018/07/17 15:55 | Nareyka, Bjorn v Haim, Matthias | 0-6,4-6 |
| ITF Germany F12 | 2018/08/13 10:00 | Guell Bartrina, Eduard v Lemstra, Sven | 6-2,6-1 |
| ITF Germany F12 | 2018/08/12 13:00 | Lemstra, Sven v Kuerschner, Alexander | 6-2,7-5 |
| ITF Germany F12 | 2018/08/12 08:00 | Lemstra, Sven v Pirolt, Pietro | 6-2,6-3 |
| Challenger Ismaning Qual | 2017/10/14 15:05 | Lemstra, Sven v Kai Lemstra | 2-6,0-6 |
| ITF Germany F14 | 2017/10/09 10:00 | Haerteis, Johannes v Lemstra, Sven | 6-3,6-1 |
| ITF Germany F14 | 2017/10/08 07:00 | Marcel Strickroth v Lemstra, Sven | 6-0,1-6,3-6 |
| ITF Germany F14 | 2016/10/09 07:00 | Laurin Aerne v Lemstra, Sven | 4-6,7-6,2-6 |
| ITF Germany F14 | 2016/10/09 07:00 | Lemstra, Sven v Kai Lemstra | 1-6,2-6 |