Stadium: Court 1 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Hyvinkaa | 2023/08/01 07:00 | Johannes Seeman v Filip Apltauer | 4-6,5-7 |
| 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 |
| ITF M25 Sintra | 2023/09/11 09:00 | Tiago Boschmans v Daniel Batista | 3-6,1-6 |
| ITF M25 Sintra | 2023/09/10 08:30 | Ander Tarrio Ponte v Tiago Boschmans | 2-6,5-7 |
| ITF M25 Sintra | 2023/09/03 08:00 | Tomas Almeida v Tiago Boschmans | 6-4,3-6,10-8 |
| ITF M25 Porto | 2023/07/24 10:00 | Tiago Boschmans v Davide Ferrarolli | 6-7,6-7 |
| ITF M25 Porto | 2023/07/23 09:00 | Tiago Boschmans v Matteo Covato | 6-2,7-5 |
| Challenger Oeiras | 2023/04/16 14:50 | Tiago Boschmans v Andrey Chepelev | 4-6,3-6 |