Round: 26 Ground: Clay
| ITF Germany F12 | 2017/08/23 15:00 | Marc Sieber v Joel Vincent Link | 6-4,6-1 |
| Challenger - Meerbusch | 2017/08/17 11:00 | Marc Sieber v Karim-Mohamed Maamoun | 2-6,3-6 |
| Challenger - Meerbusch | 2017/08/15 17:00 | Dustin Brown v Marc Sieber | 2-6,2-6 |
| Challenger Meerbusch Qual | 2017/08/14 09:30 | Marc Sieber v Daniel Gimeno-Traver | 7-5,6-3 |
| Challenger Meerbusch Qual | 2017/08/13 12:55 | Marc Sieber v Alexandar Lazarov | 6-3,6-2 |
| Challenger Marburg Qual | 2017/07/02 10:20 | Marc Sieber v Matthias Bachinger | 2-6,7-6,3-6 |
| Challenger Marburg Qual | 2017/07/01 10:00 | Marc Sieber v Amer Naow | 6-1,6-2 |
| ITF Turkey F24 | 2017/06/25 08:00 | Marc Sieber v Dimitar Kuzmanov | 3-6,6-2,1-6 |
| ITF Germany F12 | 2017/08/22 10:05 | Niklas Schell v Gabriel Schmidt | 6-4,3-6,4-6 |
| ITF Germany F12 | 2017/08/21 08:00 | Gabriel Schmidt v Sebastian Buehler | 6-1,6-1 |
| ITF Austria F6 | 2017/08/06 09:40 | Nicolas Xiviller v Gabriel Schmidt | 6-3,6-3 |
| ITF Austria F6 | 2017/08/05 10:00 | Johannes Bangratz v Gabriel Schmidt | 3-6,0-6 |
| ITF Austria F5 | 2017/07/31 08:00 | Felix Corwin v Gabriel Schmidt | 6-3,6-4 |
| ITF Austria F5 | 2017/07/30 08:00 | Gasper Bezjak v Gabriel Schmidt | 1-6,1-6 |
| ITF Austria F5 | 2017/07/29 07:00 | Gabriel Schmidt v Nicolas Parizzia | 6-0,6-1 |
| ITF Slovakia F1 | 2017/07/24 08:00 | Andrew Watson v Gabriel Schmidt | 6-2,7-5 |