Stadium: Court 6 Round: 25 Ground: Hardcourt indoor
| ITF M25 Ystad | 2023/08/15 12:25 | Marvin Moeller v Adam Heinonen | 6-2,6-7,7-5 |
| ITF M15 Hyvinkaa | 2023/08/04 09:00 | Adam Heinonen v Leonardo Rossi | 4-6,3-6 |
| ITF M15 Hyvinkaa | 2023/08/02 15:00 | Adam Heinonen v Niccolo Catini | 6-1,6-2 |
| ITF M15 Hyvinkaa | 2023/08/01 07:00 | Adam Heinonen v Robin Erik Parts | 6-2,4-6,10-5 |
| ITF M15 Hyvinkaa | 2023/07/31 09:30 | Adam Heinonen v Henrik Bladelius | 6-2,6-7,10-2 |
| ITF M15 Vejle | 2023/07/24 12:00 | Adam Heinonen v Facundo Bermejo | 4-6,6-4,8-10 |
| ITF M15 Sofia | 2023/07/06 08:10 | Adam Heinonen v Denis Klok | 1-6,1-6 |
| ITF M15 Sofia | 2023/07/05 06:00 | Sean Hess v Adam Heinonen | 7-5,5-7,5-7 |
| ITF M15 Buschhausen | 2023/09/13 14:45 | Jakob Schnaitter v Tom Gentzsch | 4-6,6-4,3-6 |
| ITF M15 Buschhausen | 2023/09/11 14:45 | Jakob Schnaitter v Vojtech Vlkovsky | 6-2,6-1 |
| ITF M15 Buschhausen | 2023/09/11 08:00 | Jakob Schnaitter v Tristan Nitschke | 6-1,6-3 |
| ITF M15 Allershausen | 2023/08/30 12:20 | Jakob Schnaitter v Yannik Kelm | 6-4,6-7,2-6 |
| ITF M15 Uberlingen | 2023/08/20 12:00 | Max Hans Rehberg v Jakob Schnaitter | 7-6,1-6,2-6 |
| ITF M15 Uberlingen | 2023/08/19 10:00 | Arthur Nagel v Jakob Schnaitter | 2-6,4-6 |
| ITF M15 Uberlingen | 2023/08/18 10:00 | Lasse Poertner v Jakob Schnaitter | 2-6,4-6 |
| ITF M15 Uberlingen | 2023/08/17 10:05 | Jakob Schnaitter v Peter Heller | 1-6,7-5,6-4 |