Stadium: Court 3 Round: 25 Ground: Clay
| ITF M25 Wetzlar | 2021/08/04 08:00 | Marvin Moeller v Peter Heller | 2-6,3-6 |
| ITF M15 Antalya | 2023/04/21 07:30 | Viacheslav Bielinskyi v Peter Heller | 6-7,6-0,6-3 |
| ITF M15 Antalya | 2023/04/20 07:00 | Atakan Karahan v Peter Heller | 1-6,0-6 |
| ITF M15 Antalya | 2023/04/19 07:00 | Marsel Ilhan v Peter Heller | 5-7,1-6 |
| ITF M15 Antalya | 2023/04/05 09:55 | Michel Hopp v Peter Heller | 1-6,4-6 |
| ITF M15 Antalya | 2023/04/01 09:55 | Peter Heller v Cezar Cretu | 4-6,4-6 |
| ITF M15 Antalya | 2023/03/31 11:05 | Peter Heller v Mirko Martinez | 6-1,6-7,6-2 |
| ITF M15 Antalya | 2023/03/30 09:30 | Peter Heller v Nicolas Zanellato | 6-1,6-1 |
| ITF M15 Antalya | 2023/03/29 11:45 | Peter Heller v Adam Moundir | 3-6,6-2,6-4 |
| ITF M15 Sarajevo | 2023/06/08 08:10 | Luka Mikrut v Marvin Moeller | 6-3,2-6,6-2 |
| ITF M15 Sarajevo | 2023/06/07 09:05 | Marvin Moeller v Mohamed Safwat | 7-6,6-1 |
| Challenger Troisdorf | 2023/05/29 08:30 | Terence Atmane v Marvin Moeller | 6-0,6-3 |
| Challenger Troisdorf | 2023/05/28 08:30 | Marvin Moeller v Vladyslav Orlov | 6-1,6-3 |
| ITF M15 Meerbusch | 2023/04/28 15:30 | Marvin Moeller v Marat Sharipov | 3-6,5-7 |
| ITF M15 Meerbusch | 2023/04/27 10:35 | Marvin Moeller v Jakub Nicod | 6-4,1-6,6-3 |
| ITF M15 Meerbusch | 2023/04/26 10:50 | Aldin Setkic v Marvin Moeller | 4-6,3-6 |
| ITF M15 Antalya | 2023/04/21 07:20 | Marvin Moeller v Simon A Ivanov | 4-6,2-6 |