Stadium: Court 6 Round: 25 Ground: Clay
| 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 |
| ITF M15 Kursumlijska Banja | 2023/05/31 07:00 | Niklas Schell v Johan A Rodriguez Rodriguez | 6-7,6-2,6-3 |
| ITF M15 Alaminos-Larnaca | 2023/05/12 08:00 | Sebastian Gima v Niklas Schell | 4-6,6-3,6-1 |
| ITF M15 Alaminos-Larnaca | 2023/05/11 08:00 | Niklas Schell v Vlad Andrei Dancu | 7-5,3-6,7-6 |
| ITF M15 Alaminos-Larnaca | 2023/05/10 09:45 | Aaron Cohen v Niklas Schell | 6-1,3-6,2-6 |
| ITF M15 Alaminos-Larnaca | 2023/05/04 07:40 | Sebastian Gima v Niklas Schell | 6-1,6-3 |
| German Championship | 2022/12/04 13:00 | Edison Ambarzumjan v Robin Sanz | 6-3,6-2 |