Stadium: KIRSCHBAUM Court 3 Round: 25 Ground: Carpet indoor
| ITF Germany F16 | 2017/10/23 10:00 | Dzhanashia, Shalva v Guenther, Valentin | 6-4,7-5 |
| ITF Germany F16 | 2017/10/22 08:00 | Seibert, Tim v Guenther, Valentin | 6-4,3-6,4-6 |
| ITF Germany F15 | 2017/10/15 12:00 | Guenther, Valentin v Boulais, Justin | 6-3,6-1 |
| ITF Germany F14 | 2017/10/10 10:00 | Elmar Ejupovic v Guenther, Valentin | 6-4,6-7,6-3 |
| ITF Germany F14 | 2017/10/09 10:00 | Dzhanashia, Shalva v Guenther, Valentin | 5-7,3-6 |
| ITF Germany F14 | 2017/10/08 11:30 | Robert Strombachs v Guenther, Valentin | 6-2,3-6,4-6 |
| ITF Italy F30 | 2017/09/18 14:30 | Guenther, Valentin v Maxime Chazal | 1-6,1-6 |
| ITF Italy F30 | 2017/09/17 13:00 | Toby Martin v Guenther, Valentin | 6-2,6-4 |
| ITF Germany F1 | 2018/01/08 12:30 | Karlo Cubelic v Kai Lemstra | 6-4,2-6,4-6 |
| ITF Germany F1 | 2018/01/07 15:00 | Schmidt, Gabriel v Karlo Cubelic | 5-7,3-6 |
| ITF Germany F1 | 2018/01/07 08:00 | Hendrik Jebens v Karlo Cubelic | 6-7,6-7 |
| ITF Germany F15 | 2017/10/15 12:00 | Jonas Trinker v Karlo Cubelic | 7-5,4-6,6-3 |
| ITF Germany F8 Qual | 2017/07/16 11:00 | Elmar Ejupovic v Karlo Cubelic | 6-0,6-4 |
| ITF Germany F4 | 2017/06/18 11:00 | Karlo Cubelic v von Hindte, Leonard | 2-6,2-6 |
| ITF Germany F2 Qual | 2017/01/16 09:00 | Karlo Cubelic v Czepielewski, Daniel | 2-6,3-6 |
| ITF Germany F16 | 2016/10/24 08:00 | Karlo Cubelic v Weyhausend, Arnd | 5-7,2-6 |