Stadion: Court 1 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 - Monastir | 2021/08/29 08:00 | August Holmgren v Masamichi Imamura | 6-4,6-2 |
| ITF - M15 - Frederiksberg | 2021/08/07 11:05 | Markus Eriksson v August Holmgren | 6-3,3-6,6-4 |
| ITF - M15 - Frederiksberg | 2021/08/06 12:40 | Mick Veldheer v August Holmgren | 4-6,4-6 |
| ITF - M15 - Frederiksberg | 2021/08/05 12:25 | August Holmgren v Sebastian Prechtel | 6-3,3-6,6-3 |
| 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 - Monastir | 2021/08/30 10:00 | Johannes Ingildsen v Michael Zhu | 6-2,6-0 |
| ITF - M15 - Monastir | 2021/08/29 08:00 | Ajay Pruthvi Nemakal v Johannes Ingildsen | 2-6,1-6 |
| ITF - M15 - Frederiksberg | 2021/08/06 09:00 | Benjamin Hannestad v Johannes Ingildsen | 2-6,7-6,6-2 |
| ITF - M15 - Frederiksberg | 2021/08/05 08:00 | Johannes Ingildsen v Matias Zukas | 6-3,6-1 |
| ITF - M15 - Frederiksberg | 2021/08/04 09:40 | Elmer Moller v Johannes Ingildsen | 5-7,1-6 |
| ITF - M15 - Vejle | 2021/07/25 11:00 | Yannik Steinegger v Johannes Ingildsen | 6-4,6-2 |
| UTR Pro Tennis Series - Kopenhagen | 2021/06/15 14:15 | Philip Hjorth v Johannes Ingildsen | 6-3,6-1 |
| ITF - USA F4 | 2018/01/14 19:00 | Johannes Ingildsen v Karl Poling | 6-4,4-6,4-6 |