Stadium: Court 09 Round: 26 Ground: Clay
| ITF M15 Antalya | 2021/04/30 09:50 | Rio Noguchi v Peter Heller | 6-2,3-6,2-6 |
| ITF M15 Antalya | 2021/04/29 07:25 | Dan Alexandru Tomescu v Peter Heller | 6-0,3-6,5-7 |
| ITF M15 Antalya | 2021/04/28 07:00 | Riccardo Balzerani v Peter Heller | 1-6,4-6 |
| ITF M25 Meerbusch | 2021/04/16 10:45 | Elmar Ejupovic v Peter Heller | 6-3,7-6 |
| ITF M25 Meerbusch | 2021/04/15 10:00 | Tak Khunn Wang v Peter Heller | 1-6,3-6 |
| ITF M25 Meerbusch | 2021/04/13 16:40 | Peter Heller v Viktor Durasovic | 6-3,6-4 |
| ITF M15 Antalya | 2021/03/20 07:30 | Peter Heller v Matheus Pucinelli De Almeida | 4-6,6-7 |
| ITF M15 Antalya | 2021/03/19 07:30 | Nicholas David Ionel v Peter Heller | 3-6,0-6 |