| Challenger Ochsenhausen | 2021/04/19 07:50 | Dennis Klein v Daniel Rinderer | L | 3-1 |
| Challenger Ochsenhausen | 2021/04/20 11:40 | Evgueni Chtchetinine v Daniel Rinderer | W | 2-3 |
| Challenger Ochsenhausen | 2021/04/20 07:40 | Marius Henninger v Daniel Rinderer | W | 2-3 |
| Challenger Ochsenhausen | 2021/04/19 19:20 | Daniel Rinderer v Josip Huzjak | W | 3-2 |
| Challenger Ochsenhausen | 2021/04/19 16:00 | Daniel Rinderer v Dauud Cheaib | L | 0-3 |
| Challenger Ochsenhausen | 2021/04/19 14:00 | Francisco Sanchi v Daniel Rinderer | L | 3-1 |
| Challenger Ochsenhausen | 2021/04/19 10:30 | Jiri Martinko v Daniel Rinderer | L | 3-1 |
| Challenger Ochsenhausen | 2021/04/19 07:50 | Dennis Klein v Daniel Rinderer | L | 3-1 |
| Dusseldorf Masters | 2020/08/14 17:20 | Cedric Meissner v Daniel Rinderer | L | 4-3 |
| Challenger Ochsenhausen | 2021/05/11 14:40 | Dennis Klein v Fedor Kuzmin | L | 0-3 |
| Challenger Ochsenhausen | 2021/05/11 12:35 | Carlo Rossi v Dennis Klein | W | 2-3 |
| Challenger Ochsenhausen | 2021/05/11 11:00 | Dennis Klein v Samuel Amann | W | 3-0 |
| Challenger Ochsenhausen | 2021/05/11 07:40 | Dennis Klein v Josip Huzjak | W | 3-2 |
| Challenger Ochsenhausen | 2021/05/10 18:40 | Dennis Klein v Fedor Kuzmin | L | 1-3 |
| Challenger Ochsenhausen | 2021/05/10 17:20 | Dennis Klein v Carlo Rossi | L | 0-3 |
| Challenger Ochsenhausen | 2021/05/10 11:50 | Dennis Klein v Michael Engelhardt | W | 3-2 |
| Challenger Ochsenhausen | 2021/05/10 09:10 | Dennis Klein v Juri Grauer | W | 3-0 |