Stadium: Center Court Round: 46
| Challenger Braunschweig Qual | 2017/07/08 08:00 | Julian Onken v Arnd Weyhausen | 6-2,6-4 |
| ITF Germany F4 | 2017/06/22 15:25 | Dominik Boehler v Julian Onken | 6-3,6-1 |
| ITF Germany F4 | 2017/06/20 14:20 | Linus Krohn v Julian Onken | 5-7,6-7 |
| ITF Turkey F15 | 2017/04/18 10:15 | Julian Onken v Cem Ilkel | 2-6,3-6 |
| ITF Turkey F14 | 2017/04/13 08:30 | Marsel Ilhan v Julian Onken | 4-6,6-1,6-0 |
| ITF Turkey F14 | 2017/04/11 07:30 | Simon Navarro v Julian Onken | 2-6,7-6,2-6 |
| ITF Croatia F4 | 2017/03/28 12:00 | Julian Onken v Andrej Martin | 4-6,7-6,1-6 |
| ITF Croatia F3 | 2017/03/21 09:00 | Jurij Rodionov v Julian Onken | 2-6,7-6,6-1 |
| ITF Germany F5 | 2017/07/01 11:30 | Nicola Kuhn v Alexander Vasilenko | 3-6,7-5,4-6 |
| ITF Germany F5 | 2017/06/30 13:10 | Nicola Kuhn v Peter Torebko | 7-5,6-4 |
| ITF Germany F5 | 2017/06/29 09:00 | Nicola Kuhn v Samuel Bensoussan | 6-1,7-5 |
| ITF Germany F5 | 2017/06/27 11:55 | Nicola Kuhn v Sam Riffice | 6-2,6-2 |
| ITF Belgium F1 | 2017/06/24 12:30 | Nicola Kuhn v Miomir Kecmanovic | 6-1,3-6,1-6 |
| ITF Belgium F1 | 2017/06/23 08:00 | Lukas Ollert v Nicola Kuhn | 5-7,3-6 |
| ITF Belgium F1 | 2017/06/21 09:00 | Juan Carlos Saez v Nicola Kuhn | 6-3,2-6,2-6 |
| ITF Belgium F1 | 2017/06/20 08:00 | Louis Chaix v Nicola Kuhn | 3-6,4-6 |