Stadium: C1 Round: 25 Ground: Clay
| Challenger Meerbusch | 2023/08/10 11:35 | Kilian Feldbausch v Daniel Rincon | 2-6,1-6 |
| Challenger Meerbusch | 2023/08/08 14:45 | Kilian Feldbausch v Max Houkes | 7-5,6-4 |
| ATP Kitzbuhel | 2023/07/29 09:00 | Kilian Feldbausch v Ivan Gakhov | 4-6,6-7 |
| Challenger Zug | 2023/07/25 13:00 | Kilian Feldbausch v Fabio Fognini | 4-6,2-6 |
| ATP Gstaad | 2023/07/15 10:10 | Facundo Bagnis v Kilian Feldbausch | 7-6,6-3 |
| ITF M25 Klosters | 2023/07/04 11:25 | Gabriel Debru v Kilian Feldbausch | 6-4,6-7,6-4 |
| Challenger Roseto | 2023/04/20 09:00 | Kilian Feldbausch v Franco Agamenone | 0-6,1-6 |
| Challenger Roseto | 2023/04/19 09:00 | Mariano Navone v Kilian Feldbausch | 6-7,0-6 |
| ITF M25 Klosters | 2023/07/05 14:10 | Francois Musitelli v Jeffrey Von Der Schulenburg | 6-3,6-4 |
| ITF M15 Alkmaar | 2023/07/01 13:00 | Jeffrey Von Der Schulenburg v Elmer Moller | 6-4,3-6,0-6 |
| ITF M15 Alkmaar | 2023/06/30 14:00 | Karl Friberg v Jeffrey Von Der Schulenburg | 6-4,6-7,3-6 |
| ITF M15 Alkmaar | 2023/06/29 12:05 | Jeffrey Von Der Schulenburg v Guy Den Ouden | 6-4,3-6,7-5 |
| ITF M15 Alkmaar | 2023/06/28 14:20 | Jeffrey Von Der Schulenburg v Younes Lalami Laaroussi | 7-5,7-5 |
| ITF M15 Saarlouis | 2023/06/25 12:00 | Sander Jong v Jeffrey Von Der Schulenburg | 6-1,6-0 |
| ITF M15 Saarlouis | 2023/06/23 16:30 | Marcel Zielinski v Jeffrey Von Der Schulenburg | 6-7,6-2,1-6 |
| ITF M15 Saarlouis | 2023/06/22 11:10 | Tom Gentzsch v Jeffrey Von Der Schulenburg | 4-6,3-6 |