Stadium: Court 1 Round: 54 Ground: Clay
| ITF M15 Vejle | 2023/07/24 09:30 | Oskar Jansson v Emil Chr E Mikkelsen | 6-2,6-3 |
| ITF M25 Kassel | 2023/07/10 08:00 | Vincent Marysko v Oskar Jansson | 4-6,6-4,10-8 |
| ITF M25 The Hague | 2023/07/05 17:10 | Collin Altamirano v Oskar Jansson | 6-2,6-4 |
| ITF M25 The Hague | 2023/07/03 13:55 | Oskar Jansson v David Quayle | 6-1,6-2 |
| ITF M25 The Hague | 2023/07/02 10:30 | Oskar Jansson v Miko Wassermann | 7-6,6-1 |
| ITF - M15 Kalmar | 2023/05/19 10:25 | Oskar Jansson v Lucas Catarina | 6-7,6-7 |
| ITF - M15 Kalmar | 2023/05/18 09:00 | Oskar Jansson v Erik Grevelius | 6-4,4-6,6-4 |
| ITF - M15 Kalmar | 2023/05/17 12:30 | Lucas Renard v Oskar Jansson | 6-4,3-6,2-6 |
| ITF M15 Vejle | 2023/07/24 09:30 | Samuel Rovai v Korsgaard, Henrik Heise | 3-6,1-6 |
| ITF M25 Risskov/Aarhus | 2023/06/15 13:05 | Korsgaard, Henrik Heise v Elmer Moller | 2-6,1-6 |
| ITF M25 Risskov/Aarhus | 2023/06/13 08:30 | Gonzalo Bueno v Korsgaard, Henrik Heise | 5-7,7-6,2-6 |
| UTR Pro Miki | 2023/04/23 03:23 | Korsgaard, Henrik Heise v Ryotaro Taguchi | 6-3,6-2 |
| UTR Pro Miki | 2023/04/21 05:30 | Korsgaard, Henrik Heise v Natsuki Yamamoto | 6-3,6-4 |
| UTR Pro Miki | 2023/04/19 00:56 | Korsgaard, Henrik Heise v Shohei Yamashita | 6-1,6-1 |
| UTR Pro Miki | 2023/04/18 02:50 | Korsgaard, Henrik Heise v Haruki Okude | 6-0,6-1 |
| UTR Pro Miki | 2023/04/17 00:30 | Bang Shuo Yin v Korsgaard, Henrik Heise | 3-6,1-6 |