Stadium: Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2023/11/26 08:00 | Stefan Peter Hampe v Leon Formella | 6-3,6-3 |
| ITF M15 Monastir | 2023/11/19 12:30 | Stefan Peter Hampe v Leon Formella | 6-2,6-4 |
| ITF M25 Monastir | 2023/11/12 08:00 | Ryusuke Horiuchi v Leon Formella | 6-4,7-6 |
| ITF M15 Monastir | 2023/11/08 12:10 | Leon Formella v Egor Agafonov | 1-6,6-4,2-6 |
| ITF M15 Monastir | 2023/10/29 09:30 | Noel Larwig v Leon Formella | 6-3,6-3 |
| ITF M15 Monastir | 2023/10/23 08:00 | Jean-Christian Morandais v Leon Formella | 6-4,6-4 |
| ITF M15 Monastir | 2023/10/22 08:00 | Leon Formella v Adam Kaczmarek | 6-2,6-2 |
| ITF M25 Pardubice | 2023/09/17 10:30 | Leon Formella v Jan Facek | 4-6,6-7 |
| ITF M25 Monastir | 2023/11/29 08:30 | Mark Wallner v Jakob Schnaitter | 1-6,0-6 |
| ITF M25 Monastir | 2023/11/27 13:00 | Mark Wallner v Federico Bove | 6-2,7-5 |
| ITF M25 Monastir | 2023/11/27 10:00 | Mark Wallner v Yanick Schneider | 6-0,6-1 |
| ITF M25 Monastir | 2023/11/22 13:55 | Robert Strombachs v Mark Wallner | 7-6,6-2 |
| ITF M25 Monastir | 2023/11/20 13:30 | Mark Wallner v Mae Malige | 6-4,4-6,11-9 |
| ITF M25 Monastir | 2023/11/20 08:00 | Mark Wallner v Frederic Schlossmann | 6-4,5-7,10-8 |
| ITF M25 Austin | 2023/11/07 15:50 | Mark Wallner v Lorenzo Esquici | 6-3,2-6,7-10 |
| ITF M25 Austin | 2023/11/06 16:00 | Mark Wallner v Phil Exner | 6-2,6-4 |