Stadium: Court 2 Round: 26 Ground: Clay
| ITF M15 Metzingen | 2023/07/26 12:30 | Stefan Popovic v Alexander Donski | 2-6,6-3,7-5 |
| ITF M15 Uslar | 2023/07/23 12:00 | Sebastian Prechtel v Stefan Popovic | 6-3,4-6,6-3 |
| ITF M15 Uslar | 2023/07/22 11:30 | Nicolas Zanellato v Stefan Popovic | 3-6,2-6 |
| ITF M15 Uslar | 2023/07/20 11:00 | Stefan Popovic v Adrian Oetzbach | 7-6,6-4 |
| ITF M15 Uslar | 2023/07/18 15:55 | Stefan Popovic v Max Wiskandt | 7-5,6-3 |
| ITF M25 Marburg | 2023/07/07 09:00 | Timo Stodder v Stefan Popovic | 6-1,6-3 |
| ITF M25 Marburg | 2023/07/06 13:10 | Max Wiskandt v Stefan Popovic | 7-6,3-6,6-7 |
| ITF M25 Marburg | 2023/07/05 15:00 | Stefan Popovic v Wilson Leite | 3-6,6-3,6-3 |
| ITF M15 Metzingen | 2023/07/26 11:00 | Leopold Zima v Yannik Kelm | 5-7,6-2,1-6 |
| ITF M15 Monastir | 2023/07/12 10:25 | Yassine Smiej v Yannik Kelm | 6-4,7-5 |
| ITF M25 Marburg | 2023/07/04 16:40 | Timo Stodder v Yannik Kelm | 6-2,6-4 |
| ITF M15 Kamen | 2023/06/29 13:00 | Yannik Kelm v Niels Visker | 6-2,4-6,4-6 |
| ITF M15 Kamen | 2023/06/28 13:00 | Yannik Kelm v Dominik Boehler | 6-3,6-3 |
| ITF M15 Saarlouis | 2023/06/20 11:35 | Yannik Kelm v Sander Jong | 1-6,0-6 |
| ITF M25 Nussloch | 2023/01/24 11:45 | Yannik Kelm v Peter Heller | 5-7,2-6 |
| Challenger Heilbronn | 2022/05/08 11:35 | Sumit Nagal v Yannik Kelm | 6-2,6-1 |