Stadium: Court 3 Round: 25 Ground: Clay
| ITF Germany F16 | 2017/10/22 08:00 | Kai Lemstra v Seibert, Tim | 3-6,1-6 |
| ITF Germany F16 | 2017/10/22 08:00 | Seibert, Tim v Guenther, Valentin | 6-4,3-6,4-6 |
| ITF Germany F15 | 2017/10/16 08:00 | Ryan Peniston v Seibert, Tim | 6-1,6-4 |
| ITF Germany F11 | 2017/08/13 13:00 | Aichhorn, Jakob v Seibert, Tim | 6-4,6-7,6-1 |
| ITF Germany F11 | 2017/08/13 08:00 | Seibert, Tim v Flinner, Marek | 7-6,6-2 |
| ITF Germany F10 | 2017/08/06 11:00 | Dischinger, Eduardo v Seibert, Tim | 6-0,7-5 |
| ITF Germany F9 | 2017/07/31 15:00 | Seibert, Tim v Matthew Dellavedova | 6-2,4-6,2-6 |
| ITF Germany F9 | 2017/07/31 09:00 | Seibert, Tim v Hazem Naw | 7-6,0-6,6-2 |
| ITF Germany F4 | 2018/06/20 13:40 | Hirschmueller, Christian v Marvin Moeller | 3-6,2-6 |
| ITF Bosnia and Herzegovina F2 | 2018/05/23 08:00 | Alexandros Skorilas v Hirschmueller, Christian | 6-2,6-3 |
| ITF Bosnia and Herzegovina F1 | 2018/05/17 08:00 | Hirschmueller, Christian v Jotovski, Tomislav | 3-6,3-6 |
| ITF Bosnia and Herzegovina F1 | 2018/05/16 09:00 | Hirschmueller, Christian v Wang, Guan Kai | 6-3,6-3 |
| ITF Sweden F1 | 2018/05/08 13:40 | Hirschmueller, Christian v Lucas Renard | 0-6,3-6 |
| ITF Egypt F16 | 2018/05/02 15:00 | Hirschmueller, Christian v Niels Lootsma | 1-6,6-3,4-6 |
| Egypt F15, Singles Qualifying | 2018/04/25 08:00 | Zhurbin, Alexander v Hirschmueller, Christian | 7-5,6-1 |
| Egypt F14, Singles Qualifying | 2018/04/17 08:00 | Hirschmueller, Christian v Hoyt, Evan | 4-6,6-4,1-6 |