Stadium: Court 3 Round: 54 Ground: Clay
| ITF M15 Hyvinkaa | 2023/07/31 09:30 | Ivan Denisov v Johannes Seeman | 2-6,2-6 |
| ITF M25 Kramsach | 2023/07/23 08:00 | Johannes Seeman v Batiste Guerra | 4-6,7-6,6-10 |
| ITF M15 Monastir | 2023/06/25 10:30 | Loann Massard v Johannes Seeman | 6-3,6-7,10-6 |
| ITF M15 Monastir | 2023/06/19 08:30 | Patrick Kotan v Johannes Seeman | 7-5,6-2 |
| ITF M15 Monastir | 2023/06/18 12:00 | Johannes Seeman v Bruno Fernandez | 6-2,6-3 |
| ITF M15 Vaasa | 2023/06/06 10:00 | Johannes Seeman v Oskar Antinheimo | 6-3,3-6,8-10 |
| ITF M15 Vaasa | 2023/06/05 12:30 | Noel Larwig v Johannes Seeman | 4-6,4-6 |
| Davis Cup | 2023/02/05 20:45 | Jacob Bicknell v Johannes Seeman | 1-6,0-6 |
| ITF M15 Hyvinkaa | 2023/07/31 09:30 | Oskari Eerola v Filip Apltauer | 4-6,3-6 |
| ITF M15 Uslar | 2023/07/19 11:35 | Filip Apltauer v Jakub Nicod | 2-6,6-4,3-6 |
| ITF M15 Uslar | 2023/07/17 14:30 | Filip Apltauer v Mariano Dedura-Palomero | 6-3,6-4 |
| ITF M25 Kassel | 2023/07/11 11:10 | Martin Benes v Filip Apltauer | 5-7,6-2,10-7 |
| ITF M25 Kassel | 2023/07/10 14:15 | Richard Antoni v Filip Apltauer | 1-6,1-6 |
| ITF M15 Alkmaar | 2023/06/26 08:00 | Filip Apltauer v Stijn Pel | 3-6,6-2,1-10 |
| ITF M25 Poprad | 2023/06/20 08:00 | Matthew Romios v Filip Apltauer | 7-6,6-2 |
| ITF M25 Poprad | 2023/06/19 08:00 | Filip Apltauer v Jiri Cizek | 6-3,5-7,10-8 |