Stadion: Court 4 Round: 25 Ground: Clay
| ITF - M15 - Antalya | 2021/05/04 07:00 | Flemming Peters v Karl Friberg | 3-6,5-7 |
| 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 - Antalya | 2021/05/01 07:30 | Peter Heller v Jeroen Vanneste | 3-6,3-6 |
| ITF - M15 - Antalya | 2021/04/30 09:50 | Rio Noguchi v Peter Heller | 6-2,3-6,2-6 |
| ITF - M15 - Antalya | 2021/04/29 07:25 | Dan Alexandru Tomescu v Peter Heller | 6-0,3-6,5-7 |
| ITF - M15 - Antalya | 2021/04/28 07:00 | Riccardo Balzerani v Peter Heller | 1-6,4-6 |
| ITF - M25 - Meerbusch | 2021/04/16 10:45 | Elmar Ejupovic v Peter Heller | 6-3,7-6 |
| ITF - M25 - Meerbusch | 2021/04/15 10:00 | Tak Khunn Wang v Peter Heller | 1-6,3-6 |
| ITF - M25 - Meerbusch | 2021/04/13 16:40 | Peter Heller v Viktor Durasovic | 6-3,6-4 |
| ITF - M15 - Antalya | 2021/03/20 07:30 | Peter Heller v Matheus P De Almeida | 4-6,6-7 |