Stadium: Court 3 Round: 25 Ground: Clay
| ITF - M15 Frankfurt Am Main | 2023/08/09 15:20 | Philip Florig v John H Lithen | 6-3,6-1 |
| ITF - M15 Frankfurt Am Main | 2023/08/07 13:00 | John H Lithen v Sven Corbinais | 6-3,6-1 |
| ITF - M15 Frankfurt Am Main | 2023/08/07 08:00 | John H Lithen v Dennis Dragomirov | 6-2,6-4 |
| ITF - M15 Uslar | 2023/07/20 09:30 | Gilles Arnaud Bailly v John H Lithen | 6-1,6-1 |
| ITF - M15 Uslar | 2023/07/19 12:35 | John H Lithen v Diego Dedura-Palomero | 6-3,6-1 |
| ITF - M15 Uslar | 2023/07/17 10:30 | John H Lithen v Daniel Orlita | 6-2,6-2 |
| ITF - M15 Uslar | 2023/07/17 08:00 | John H Lithen v Vojtech Mares | 6-1,6-3 |
| Challenger - Palmas del Mar | 2023/06/12 15:00 | Nick Chappell v John H Lithen | 4-6,6-3,6-3 |
| ITF - M25 Osijek | 2023/08/12 08:30 | Sebastian Gima v Luka Mikrut | 4-6,6-2,1-6 |
| ITF - M25 Osijek | 2023/08/11 08:25 | Sebastian Gima v Matej Dodig | 7-6,6-2 |
| ITF - M25 Osijek | 2023/08/10 13:05 | Sebastian Gima v Maurus Malgiaritta | 6-0,7-6 |
| ITF - M25 Osijek | 2023/08/09 09:10 | Sebastian Gima v Gal Emersic Potocnik | 6-4,6-0 |
| ITF - M25 Pitesti | 2023/08/04 07:00 | Radu Mihai Papoe v Sebastian Gima | 6-4,6-1 |
| ITF - M25 Pitesti | 2023/08/02 07:45 | David Cristian Carteputreda v Sebastian Gima | 2-6,0-6 |
| Challenger - Tampere | 2023/07/17 13:40 | Duje Ajdukovic v Sebastian Gima | 7-6,6-4 |
| Challenger - Tampere | 2023/07/16 10:30 | Oren Vasser v Sebastian Gima | 7-6,1-6,2-6 |