| ITF M15 Marburg | 2019/07/08 09:00 | Guenther, Valentin v Kahlke, Jannis | 6-4,6-2 |
| ITF M15 Marburg | 2019/07/08 07:00 | Hain, Jan Soeren v Kahlke, Jannis | 6-7,4-6 |
| ITF M15 Kaarst | 2019/02/04 08:30 | Daniel De Jonge v Kahlke, Jannis | 7-5,6-4 |
| ITF - M15 Sharm El Sheikh | 2019/01/21 09:30 | Kacper Zuk v Kahlke, Jannis | 7-5,6-0 |
| ITF Egypt F28 | 2018/11/22 09:15 | Kahlke, Jannis v Dougaz, Aziz | 2-6,6-7 |
| ITF Egypt F28 | 2018/11/21 13:10 | Kahlke, Jannis v Vehovec, Jan | 6-0,6-0 |
| ITF Egypt F28 | 2018/11/19 08:00 | Pisane, Tom v Kahlke, Jannis | 3-6,4-6 |
| ITF Egypt F28 | 2018/11/18 08:00 | Kahlke, Jannis v Zharyn, Dzianis | 7-6,6-3 |
| ITF - M15 Héraklion | 2021/11/24 08:55 | Guy Den Heijer v Arthur Fery | 6-7,2-6 |
| ITF - M15 Héraklion | 2021/11/18 10:25 | Guy Den Heijer v Nicholas David Ionel | 1-6,7-5,1-6 |
| ITF - M15 Héraklion | 2021/11/17 13:25 | Sergis Kyratzis v Guy Den Heijer | 6-0,4-6,4-6 |
| ITF - M15 Héraklion | 2021/11/11 07:00 | Guy Den Heijer v Alec Deckers | 4-6,6-7 |
| ITF - M15 Héraklion | 2021/11/10 07:00 | Guy Den Heijer v Max Houkes | 7-6,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/11/07 10:30 | Guy Den Heijer v Verbeek, Sem | 6-3,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/11/06 12:00 | Deney Wassermann v Guy Den Heijer | 2-6,5-6 |
| UTR Pro Tennis Series Amsterdam | 2021/11/05 13:30 | Guy Den Heijer v Willems, Johann | 7-6,2-6,6-4 |