Round: 26 Ground: Carpet indoor
| ITF Germany F14 | 2015/09/30 10:10 | Marc Sieber v Pavel Nejedly | 6-3,6-4 |
| ITF Germany F14 | 2015/09/28 12:00 | Marc Sieber v Daniel Kopeinigg | 6-1,6-2 |
| ITF Germany F13 | 2015/08/29 11:00 | Marc Sieber v Daniel Masur | 3-6,2-6 |
| ITF Germany F13 | 2015/08/28 15:00 | Gerard Granollers-Pujol v Marc Sieber | 4-6,3-6 |
| ITF Germany F13 | 2015/08/27 12:30 | Hannes Wagner v Marc Sieber | 6-4,1-6,1-6 |
| ITF Germany F13 | 2015/08/25 11:25 | Jonas Trinker v Marc Sieber | 3-6,3-6 |
| ITF Turkey F18 | 2015/05/07 07:00 | Marc Sieber v Peter Heller | 5-7,3-6 |
| ITF Turkey F18 | 2015/05/06 10:20 | Shunsuke Wakita v Marc Sieber | 2-6,2-6 |
| ITF Germany F14 | 2015/09/30 08:00 | Bernd Kossler v Janis Podzus | 3-6,7-5,7-6 |
| ITF Austria F8 | 2015/08/16 07:30 | Bernd Kossler v Janos Zibrat | 4-6,3-6 |
| ITF Austria F8 | 2015/08/15 07:30 | Bernd Kossler v Robin Forster | 6-3,6-0 |
| ITF Austria F6 | 2015/07/28 12:40 | Filip Dolezel v Bernd Kossler | 7-6,6-1 |
| ITF Austria F6 | 2015/07/26 15:15 | Lukas Koncilia v Bernd Kossler | 4-6,2-6 |
| ITF Austria F6 | 2015/07/25 11:30 | Bernd Kossler v Yvo Panak | 7-5,3-6,6-4 |
| ITF Austria F5 | 2015/07/23 15:50 | Bernd Kossler v Matic Spec | 7-6,6-3 |
| ITF Austria F5 | 2015/07/22 09:25 | Kirill Dmitriev v Bernd Kossler | 6-1,5-7,2-6 |