Stadium: CC - Ct 2 Round: 25 Ground: Clay
| ITF M25 Ystad | 2023/08/15 08:45 | Noah Schlagenhauf v Eldin Nokic | 7-5,6-2 |
| ITF M25 Ystad | 2023/08/14 13:05 | Noah Schlagenhauf v Samuel Rovai | 6-0,6-3 |
| ITF M15 Metzingen | 2023/07/23 12:00 | Gian Luca Tanner v Noah Schlagenhauf | 2-6,6-1,10-3 |
| ITF M15 Uslar | 2023/07/17 16:00 | Justin Engel v Noah Schlagenhauf | 6-3,6-0 |
| ITF M15 Uslar | 2023/07/17 10:30 | Linus Krohn v Noah Schlagenhauf | 5-7,3-6 |
| ITF M15 Store | 2023/06/20 10:05 | Pietro Pampanin v Noah Schlagenhauf | 6-4,6-2 |
| ITF M15 Store | 2023/06/19 14:05 | Vaal Urankar v Noah Schlagenhauf | 3-6,3-6 |
| ITF M15 Duffel | 2023/06/14 08:00 | Noah Schlagenhauf v Tibo Colson | 5-7,0-6 |
| ITF M15 Hyvinkaa | 2023/08/05 10:15 | Karl Friberg v Amaury Raynel | 6-0,4-6,4-6 |
| ITF M15 Hyvinkaa | 2023/08/04 12:15 | Karl Friberg v Andrea Gola | 7-5,6-0 |
| ITF M15 Hyvinkaa | 2023/08/03 10:10 | Karl Friberg v Leonid Sheyngezikht | 6-2,7-6 |
| Challenger Zug | 2023/07/23 09:00 | Tim Handel v Karl Friberg | 6-4,4-6,7-6 |
| ATP Bastad | 2023/07/16 11:45 | Filip Misolic v Karl Friberg | 0-6,6-1,6-4 |
| Challenger Braunschweig | 2023/07/11 11:15 | Karl Friberg v Taro Daniel | 4-6,6-7 |
| Challenger Braunschweig | 2023/07/10 11:20 | Benjamin Hassan v Karl Friberg | 7-6,5-7,6-3 |
| Challenger Braunschweig | 2023/07/09 14:10 | Oscar Jose Gutierrez v Karl Friberg | 0-6,6-2,3-6 |