Round: 26 Ground: Clay
| ITF Turkey F18 | 2017/05/11 07:00 | Thomas Statzberger v Marc Sieber | 5-7,0-6 |
| ITF Turkey F18 | 2017/05/09 07:00 | Michiel de Krom v Marc Sieber | 2-6,1-6 |
| ATP Istanbul Qual | 2017/04/29 13:25 | Adrian Menendez-Maceiras v Marc Sieber | 7-5,6-4 |
| Challenger Francavilla | 2017/04/24 11:45 | Stefano Napolitano v Marc Sieber | 6-4,1-6,6-4 |
| ITF Turkey F15 | 2017/04/20 07:00 | Dimitar Kuzmanov v Marc Sieber | 4-6,6-4,6-2 |
| ITF Turkey F15 | 2017/04/18 10:55 | Oleg Ladik v Marc Sieber | 2-6,0-6 |
| ITF Turkey F14 | 2017/04/12 07:30 | Juan Pablo Varillas v Marc Sieber | 2-6,7-5,6-3 |
| Challenger St Brieuc | 2017/03/28 08:30 | Marc Sieber v Gleb Sakharov | 2-6,3-6 |
| ITF Croatia F3 | 2017/03/20 12:30 | Ryusei Makiguchi v Gabriel Schmidt | 7-6,2-6,6-2 |
| ITF Croatia F3 | 2017/03/20 09:00 | Gabriel Schmidt v Matej Sabanov | 6-1,6-0 |
| ITF Croatia F3 | 2017/03/19 08:30 | Gabriel Schmidt v Nazar Khrustalev | 4-6,6-1,6-2 |
| ITF Tunisia F9 | 2017/03/04 08:00 | Gabriel Schmidt v Yan Bondarevskiy | 2-6,4-6 |
| ITF Tunisia F8 | 2017/02/25 08:00 | Antonio Zucca v Gabriel Schmidt | 6-3,6-2 |
| ITF Germany F15 | 2016/10/16 11:00 | Gabriel Schmidt v Niklas Schell | 5-7,3-6 |
| ITF Germany F15 | 2016/10/15 08:00 | Valentin Guenther v Gabriel Schmidt | 4-6,4-6 |
| ITF Germany F14 | 2016/10/09 08:00 | Gabriel Schmidt v Adrian Oetzbach | 6-2,3-6,4-6 |