Stadium: Sparkassen Court Round: 54 Ground: Clay
| ITF Germany F2 Qual | 2017/01/15 12:00 | Valentin Guenther v Jannis Kahlke | 3-6,6-7 |
| ITF Germany F17 | 2016/10/31 09:00 | Jannis Kahlke v Valentin Guenther | 3-6,0-6 |
| ITF M15 Marburg | 2019/07/08 07:00 | Valentin Guenther v Mislav Bosnjak | 3-6,6-1,10-7 |
| ITF M15 Saarlouis | 2019/07/03 16:40 | Valentin Guenther v Raphael Baltensperger | 2-6,6-7 |
| ITF M15 Saarlouis | 2019/07/01 10:00 | Valentin Guenther v Ludvig Aaes | 6-1,6-3 |
| ITF M15 Saarlouis | 2019/07/01 08:00 | Valentin Guenther v Nicholas Bybel | 6-4,6-3 |
| ITF M15 Kamen | 2019/06/26 16:05 | Valentin Guenther v Peter Heller | 6-4,6-7,1-6 |
| ITF M15 Kamen | 2019/06/24 12:00 | Valentin Guenther v Nicholas Bybel | 6-4,6-2 |
| ITF M15 Kamen | 2019/06/24 08:00 | Valentin Guenther v Tadas Tarasevicius | 6-1,6-2 |
| ITF M15 Heraklion | 2019/05/30 07:00 | Erik Crepaldi v Valentin Guenther | 5-7,6-0,6-3 |
| ITF M15 Marburg | 2019/07/08 07:00 | Jan Soeren Hain v Jannis Kahlke | 6-7,4-6 |
| ITF M15 Kaarst | 2019/02/04 08:30 | Daniel De Jonge v Jannis Kahlke | 7-5,6-4 |
| ITF M15 Sharm El Sheikh | 2019/01/21 09:30 | Kacper Zuk v Jannis Kahlke | 7-5,6-0 |
| ITF Egypt F28 | 2018/11/22 09:15 | Jannis Kahlke v Mohamed Aziz Dougaz | 2-6,6-7 |
| ITF Egypt F28 | 2018/11/21 13:10 | Jannis Kahlke v Jan Vehovec | 6-0,6-0 |
| ITF Egypt F28 | 2018/11/19 08:00 | Tom Pisane v Jannis Kahlke | 3-6,4-6 |
| ITF Egypt F28 | 2018/11/18 08:00 | Jannis Kahlke v Dzianis Zharyn | 7-6,6-3 |
| ITF Egypt F27 | 2018/11/16 08:00 | Jannis Kahlke v Johan Nikles | 6-1,3-6,3-6 |