Stadium: C1 Round: 25 Ground: Clay
| Challenger Meerbusch | 2023/08/10 11:35 | Kilian Feldbausch v Rincon, Daniel | 2-6,1-6 |
| Challenger Meerbusch | 2023/08/08 14:45 | Kilian Feldbausch v 호우케스, 맥스 | 7-5,6-4 |
| Kitzbuhel, Austria | 2023/07/29 09:00 | Kilian Feldbausch v 가코브, 이반 | 4-6,6-7 |
| Zug, Switzerland | 2023/07/25 13:00 | Kilian Feldbausch v 포그니니, 파비오 | 4-6,2-6 |
| Gstaad, Switzerland | 2023/07/15 10:10 | 바그니스, 파쿤도 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 아가메논, 프란코 | 0-6,1-6 |
| Challenger Roseto | 2023/04/19 09:00 | 나본, 마리아노 v Kilian Feldbausch | 6-7,0-6 |
| ITF M25 Klosters | 2023/07/05 14:10 | Musitelli, F. v von Der Schulenburg, Jeffrey | 6-3,6-4 |
| ITF M15 Alkmaar | 2023/07/01 13:00 | von Der Schulenburg, Jeffrey v Moller, Elmer | 6-4,3-6,0-6 |
| ITF M15 Alkmaar | 2023/06/30 14:00 | 프리버그, 칼 v von Der Schulenburg, Jeffrey | 6-4,6-7,3-6 |
| ITF M15 Alkmaar | 2023/06/29 12:05 | von Der Schulenburg, Jeffrey v Guy Den Ouden | 6-4,3-6,7-5 |
| ITF M15 Alkmaar | 2023/06/28 14:20 | von Der Schulenburg, Jeffrey v 랄라미 라로우시, 유네스 | 7-5,7-5 |
| Saarlouis, Singles Qualifying M-ITF-GER-07A | 2023/06/25 12:00 | Sander Jong v von Der Schulenburg, Jeffrey | 6-1,6-0 |
| Saarlouis, Singles Qualifying M-ITF-GER-07A | 2023/06/23 16:30 | Zielinski, Marcel v von Der Schulenburg, Jeffrey | 6-7,6-2,1-6 |
| Saarlouis, Singles Qualifying M-ITF-GER-07A | 2023/06/22 11:10 | Tom Gentzsch v von Der Schulenburg, Jeffrey | 4-6,3-6 |