Stadium: Court 6 Round: 26 Ground: Clay
| ITF - M15 Frederiksberg | 2021/08/04 07:50 | Dominik Boehler v August Holmgren | 4-6,6-7 |
| ITF - M15 Vejle | 2021/08/01 10:20 | Ergi Kirkin v August Holmgren | 7-6,6-4 |
| ITF - M15 Vejle | 2021/07/31 11:00 | Jonathan Mridha v August Holmgren | 6-3,3-6,4-6 |
| ITF - M15 Vejle | 2021/07/30 13:30 | Patrick Kypson v August Holmgren | 2-6,6-3,6-7 |
| ITF - M15 Vejle | 2021/07/30 07:50 | August Holmgren v Mats Rosenkranz | 6-2,7-6 |
| ITF - M15 Vejle | 2021/07/27 15:30 | Anders Grinderslev v August Holmgren | 6-3,5-7,5-7 |
| ITF - M15 Monastir | 2021/07/09 08:30 | Rinky Hijikata v August Holmgren | 6-3,7-6 |
| ITF - M15 Monastir | 2021/07/08 08:30 | August Holmgren v Alejo Lorenzo Lingua Lavallen | 6-1,7-6 |
| ITF - M15 Frederiksberg | 2021/08/03 10:05 | Sebastian Prechtel v Karl Friberg | 6-1,6-1 |
| ITF - M15 Vejle | 2021/07/28 11:50 | Sebastian Prechtel v Guy Den Ouden | 2-6,2-6 |
| ITF - M15 L'Aquila | 2021/07/15 07:00 | Luciano Darderi v Sebastian Prechtel | 6-7,6-3,6-2 |
| ITF - M15 L'Aquila | 2021/07/14 08:00 | Sebastian Prechtel v Alessandro Procopio | 6-2,6-4 |
| ITF - M25 Velenje | 2021/07/08 08:00 | Sebastian Prechtel v Gonzalo Lama | 4-6,1-6 |
| ITF - M25 Velenje | 2021/07/07 10:45 | Sebastian Prechtel v Nemanja Malesevic | 6-3,6-3 |
| ITF - M15 Sarajevo | 2021/06/02 09:00 | Duje Kekez v Sebastian Prechtel | 6-1,6-1 |
| ITF - M25 Kiseljak | 2021/05/27 12:00 | Zsombor Piros v Sebastian Prechtel | 6-3,6-4 |