Stadium: Court 3 Round: 26 Ground: Clay
| Challenger Charlottesville | 2023/10/31 16:45 | Lucas Gerch v Stefan Kozlov | 6-2,5-7,7-6 |
| Challenger Hamburg | 2023/10/17 08:00 | Lucas Gerch v Antoine Bellier | 3-6,6-7 |
| Challenger Hamburg | 2023/10/16 12:45 | Lucas Gerch v Hady Habib | 6-2,6-4 |
| Challenger Hamburg | 2023/10/15 16:05 | Lucas Gerch v Mirza Basic | 7-6,5-7,6-4 |
| Challenger Malaga | 2023/10/08 09:35 | Frederico Ferreira Silva v Lucas Gerch | 6-1,6-4 |
| Challenger Szczecin | 2023/09/14 15:40 | Federico Coria v Lucas Gerch | 3-6,6-4,6-3 |
| Challenger Szczecin | 2023/09/12 18:10 | Lucas Gerch v Andrew Paulson | 7-6,4-6,6-4 |
| Challenger Szczecin | 2023/09/11 09:30 | Lucas Gerch v Miljan Zekic | 6-4,6-4 |
| Challenger Yokkaichi | 2023/11/27 06:50 | Zdenek Kolar v Mathys Erhard | 6-1,5-7,6-2 |
| Challenger Yokohama | 2023/11/23 03:00 | Yosuke Watanuki v Mathys Erhard | 6-4,6-3 |
| Challenger Yokohama | 2023/11/21 03:45 | Colin Sinclair v Mathys Erhard | 3-6,2-6 |
| Challenger Yokohama | 2023/11/20 01:00 | Mathys Erhard v Naoki Nakagawa | 6-4,3-6,4-6 |
| Challenger Kobe | 2023/11/12 01:00 | Mathys Erhard v Rio Noguchi | 4-6,0-6 |
| ITF M15 Monastir | 2023/10/26 13:50 | Mathys Erhard v Filippo Mazzola | 6-7,6-1,6-1 |
| ITF M15 Monastir | 2023/10/25 12:30 | Mathys Erhard v Max Wiskandt | 4-6,6-2,7-5 |
| ITF M25 Zaragoza | 2023/10/07 10:45 | Felix Gill v Mathys Erhard | 6-3,6-4 |