Round: 25 Ground: Clay
| ITF Germany F4 | 2017/06/19 11:00 | Mannapov, Alexander v Guenther, Valentin | 4-6,1-6 |
| ITF Germany F4 | 2017/06/18 14:00 | Staschen, Yannick v Guenther, Valentin | 2-6,4-6 |
| ITF Germany F4 | 2017/06/17 10:30 | Link, Joel Vincent v Guenther, Valentin | 1-6,4-6 |
| ITF Turkey F19 Qual | 2017/05/15 07:00 | Guenther, Valentin v Juan Bautista Otegui | 3-6,3-6 |
| ITF Turkey F19 Qual | 2017/05/14 07:00 | Du Toit, Lance-Pierre v Guenther, Valentin | 5-7,0-6 |
| ITF Turkey F19 Qual | 2017/05/13 07:00 | Guenther, Valentin v Bilgin, Burak | 6-2,6-2 |
| ITF Turkey F18 | 2017/05/11 07:00 | Stanek, Robin v Guenther, Valentin | 6-4,7-6 |
| ITF Turkey F18 | 2017/05/08 07:00 | Alexander Babanine v Guenther, Valentin | 3-6,3-6 |
| ITF Germany F4 | 2017/06/19 11:00 | Weyhausend, Arnd v Braun, Niclas | 2-6,6-4,3-6 |
| ITF USA F37 | 2016/11/12 16:00 | Axel Nefve v Braun, Niclas | 7-6,6-3 |
| ITF USA F37 | 2016/11/11 14:30 | Braun, Niclas v Ryan Peniston | 6-0,6-1 |
| ITF USA F35 | 2016/11/01 21:05 | Braun, Niclas v Ollert, Lukas | 0-6,6-4,0-6 |
| ITF USA F35 | 2016/10/31 15:00 | Braun, Niclas v Goldin, Grayson M. | 6-0,6-4 |
| ITF USA F35 | 2016/10/30 15:00 | Reinberg, Emil v Braun, Niclas | 6-3,6-7,2-6 |
| ITF USA F35 | 2016/10/28 14:30 | Braun, Niclas v Bhullard, Rana-Roop Singh | 6-3,6-2 |
| ITF Germany F4 | 2016/06/22 15:10 | Maden, Yannick v Braun, Niclas | 6-0,6-2 |