Stadium: Court 1 Round: 26 Ground: Clay
| ITF M25 Wetzlar | 2023/08/03 09:35 | Sebastian Fanselow v Yan Sabanin | 6-3,6-4 |
| Challenger Karlsruhe | 2023/07/03 10:35 | Denis Yevseyev v Sebastian Fanselow | 7-5,7-6 |
| Challenger Karlsruhe | 2023/07/02 14:15 | Andrew Paulson v Sebastian Fanselow | 2-6,5-7 |
| ITF M25 Arlon | 2023/06/29 12:00 | Sandro Kopp v Sebastian Fanselow | 6-4,4-6,7-6 |
| ITF M25 Arlon | 2023/06/28 07:50 | Boris Fassbender v Sebastian Fanselow | 2-6,3-6 |
| Challenger Parma | 2023/06/18 12:00 | Andrea Arnaboldi v Sebastian Fanselow | 6-2,6-4 |
| Challenger Heilbronn | 2023/06/06 12:10 | Sebastian Fanselow v Rudolf Molleker | 4-6,7-6,1-6 |
| Challenger Heilbronn | 2023/06/05 10:30 | Sebastian Fanselow v Vladyslav Orlov | 6-3,3-6,6-3 |
| ITF M25 Wetzlar | 2023/08/03 08:00 | Niklas Schell v Jannik Opitz | 6-4,6-4 |
| ITF M25 Telfs | 2023/07/18 10:00 | Peter Heller v Niklas Schell | 6-3,6-1 |
| Challenger Braunschweig | 2023/07/09 11:00 | Niklas Schell v Carlos Taberner | 4-6,4-6 |
| ITF M15 Kamen | 2023/06/29 11:30 | Niklas Schell v Hazem Naw | 1-6,0-6 |
| ITF M15 Kamen | 2023/06/28 10:25 | Niklas Schell v Robin Sanz | 6-4,6-7,6-3 |
| ITF M15 Duffel | 2023/06/14 09:50 | Ryan Nijboer v Niklas Schell | 6-7,6-2,6-4 |
| ITF M25 Kursumlijska Banja | 2023/06/07 18:00 | Lautaro Midon v Niklas Schell | 6-3,6-4 |
| ITF M15 Kursumlijska Banja | 2023/06/01 08:55 | Martyn Pawelski v Niklas Schell | 6-3,6-3 |