Stadium: Court 3 Round: 25 Ground: Clay
| ITF - Antalya M15 | 2023/04/21 07:30 | Viacheslav Bielinskyi v Peter Heller | 6-7,6-0,6-3 |
| ITF - Antalya M15 | 2023/04/20 07:00 | Atakan Karahan v Peter Heller | 1-6,0-6 |
| ITF - Antalya M15 | 2023/04/19 07:00 | Marsel Ilhan v Peter Heller | 5-7,1-6 |
| ITF - Antalya M15 | 2023/04/05 09:55 | Michel Hopp v Peter Heller | 1-6,4-6 |
| ITF - Antalya M15 | 2023/04/01 09:55 | Peter Heller v Cezar Cretu | 4-6,4-6 |
| ITF - Antalya M15 | 2023/03/31 11:05 | Peter Heller v Mirko Martinez | 6-1,6-7,6-2 |
| ITF - Antalya M15 | 2023/03/30 09:30 | Peter Heller v Nicolas Zanellato | 6-1,6-1 |
| ITF - Antalya M15 | 2023/03/29 11:45 | Peter Heller v Adam Moundir | 3-6,6-2,6-4 |
| Challenger Braunschweig | 2023/07/09 11:00 | Niklas Schell v Carlos Taberner | 4-6,4-6 |
| ITF - Kamen M15 | 2023/06/29 11:30 | Niklas Schell v Hazem Naw | 1-6,0-6 |
| ITF - Kamen M15 | 2023/06/28 10:25 | Niklas Schell v Robin Sanz | 6-4,6-7,6-3 |
| ITF - Duffel M15 | 2023/06/14 09:50 | Ryan Nijboer v Niklas Schell | 6-7,6-2,6-4 |
| ITF - Kursumlijska Banja M25 | 2023/06/07 18:00 | Lautaro Midon v Niklas Schell | 6-3,6-4 |
| ITF - Kursumlijska Banja M15 | 2023/06/01 08:55 | Martyn Pawelski v Niklas Schell | 6-3,6-3 |
| ITF - Kursumlijska Banja M15 | 2023/05/31 07:00 | Niklas Schell v Johan A Rodriguez Rodriguez | 6-7,6-2,6-3 |
| ITF - Alaminos-Larnaca M15 | 2023/05/12 08:00 | Sebastian Gima v Niklas Schell | 4-6,6-3,6-1 |