Stadium: Court 22 Round: 62 Ground: Clay
| ITF M15 Antalya | 2021/04/25 07:00 | Flemming Peters v Vojtech Mares | 3-6,3-6 |
| ITF M25 Meerbusch | 2021/04/11 13:30 | Alexis Boureau v Flemming Peters | 6-7,6-3,10-8 |
| ITF M15 Antalya | 2021/04/04 10:00 | Edouard Villoslada v Flemming Peters | 6-4,6-1 |
| ITF M15 Antalya | 2021/03/28 06:30 | Manuel Mazza v Flemming Peters | 6-2,3-6,10-8 |
| German Championship | 2020/12/08 09:30 | Flemming Peters v Thomas Jan Dafcik | 6-3,5-7,3-6 |
| German Masters | 2020/08/28 11:00 | Elmar Ejupovic v Flemming Peters | 6-1,7-5 |
| German Masters | 2020/08/27 12:35 | Quentin Folliot v Flemming Peters | 6-0,6-4 |
| German Masters | 2020/08/26 17:25 | Michael Geerts v Flemming Peters | 6-2,6-1 |
| ITF M15 Antalya | 2021/05/03 07:00 | Dominique Graf v Karl Friberg | 2-6,2-6 |
| ITF M15 Antalya | 2021/05/02 06:00 | Danylo Veremeychuk v Karl Friberg | 1-6,3-6 |
| ITF M15 Antalya | 2021/04/15 08:35 | Karl Friberg v Sandro Kopp | 2-6,5-7 |
| ITF M15 Antalya | 2021/04/13 07:00 | Jumpei Yamasaki v Karl Friberg | 1-6,2-6 |
| ITF M15 Antalya | 2021/04/07 07:00 | Shintaro Mochizuki v Karl Friberg | 6-1,7-5 |
| ITF M15 Sharm El Sheikh | 2021/03/10 09:45 | Karl Friberg v Oscar Jose Gutierrez | 5-7,6-2,4-6 |
| ITF M15 Sharm El Sheikh | 2021/03/09 07:30 | Karl Friberg v Alexandros Skorilas | 6-2,6-7,10-8 |
| ITF M15 Sharm El Sheikh | 2021/03/07 07:00 | Karl Friberg v Lorenzo Rottoli | 6-3,3-6,15-13 |