Stadium: Court 6 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Antalya | 2021/05/19 09:55 | Karl Friberg v Nick Hardt | 1-6,1-6 |
| ITF M15 Antalya | 2021/05/10 07:00 | Karl Friberg v Valentin Vanta | 3-6,6-7 |
| ITF M15 Antalya | 2021/05/09 07:00 | Karl Friberg v Stefanos Sakellaridis | 6-3,6-4 |
| ITF M15 Antalya | 2021/05/05 08:55 | Karl Friberg v Peter Heller | 3-6,3-6 |
| 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 Kouvola | 2021/05/26 08:55 | Leevi Saatela v Naoki Tajima | 4-6,2-6 |
| ITF M15 Sibenik | 2021/05/20 10:45 | Naoki Tajima v Dan Added | 1-6,4-6 |
| ITF M15 Sibenik | 2021/05/19 15:05 | Bozo Barun v Naoki Tajima | 6-7,1-6 |
| ITF M15 Prijedor | 2021/05/11 14:35 | Naoki Tajima v Miljan Zekic | 6-7,4-6 |
| ITF M15 Majadahonda | 2021/05/03 12:00 | Naoki Tajima v Giovanni Mpetshi Perricard | 6-3,2-6,8-10 |
| ITF M15 Majadahonda | 2021/05/02 16:15 | Naoki Tajima v Hugo Pontico | 7-6,6-0 |
| ITF M15 LPD Gran Canaria | 2021/04/27 08:55 | Naoki Tajima v Alex M Pujolras | 1-6,2-6 |
| ITF M15 St Petersburg | 2021/04/17 08:00 | Naoki Tajima v Savriyan Danilov | 4-6,2-6 |