| Challenger Series TT | 2022/09/05 17:10 | Dennis Klein v Dauud Cheaib | W | 3-1 |
| Challenger Ochsenhausen | 2021/12/14 10:00 | Dennis Klein v Dauud Cheaib | L | 1-3 |
| Challenger Ochsenhausen | 2021/12/03 14:30 | Dennis Klein v Dauud Cheaib | W | 3-0 |
| Challenger Ochsenhausen | 2021/12/02 10:50 | Dennis Klein v Dauud Cheaib | W | 3-0 |
| Challenger Ochsenhausen | 2021/11/16 14:15 | Dauud Cheaib v Dennis Klein | L | 3-0 |
| Challenger Ochsenhausen | 2021/11/15 09:30 | Dauud Cheaib v Dennis Klein | L | 3-1 |
| Challenger Ochsenhausen | 2021/08/30 18:40 | Dennis Klein v Dauud Cheaib | W | 3-0 |
| Challenger Ochsenhausen | 2021/08/10 14:40 | Dennis Klein v Dauud Cheaib | W | 3-2 |
| Challenger Series TT | 2023/01/09 14:10 | Sven Happek v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2023/01/09 11:30 | Daniel Rinderer v Dennis Klein | L | 3-2 |
| Challenger Series TT | 2023/01/09 08:50 | Kestutis Zeimys v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2022/11/01 14:30 | Dennis Klein v Josip Huzjak | W | 3-1 |
| Challenger Series TT | 2022/11/01 12:25 | Dennis Klein v Mathias Hübgen | W | 3-1 |
| Challenger Series TT | 2022/11/01 09:30 | Mohammadali Rouintanesfahani v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2022/11/01 08:10 | Arman Hajiei v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2022/10/31 18:10 | Kirill Fadeev v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2023/01/09 13:30 | Yongyin Li v Dauud Cheaib | L | 3-2 |
| Challenger Series TT | 2023/01/09 12:10 | Sven Happek v Dauud Cheaib | W | 0-3 |
| Challenger Series TT | 2023/01/09 07:30 | Yannick Vostes v Dauud Cheaib | W | 1-3 |
| Challenger Series TT | 2023/01/06 14:30 | Dauud Cheaib v Marius Henninger | W | 3-0 |
| Challenger Series TT | 2023/01/06 12:25 | Dauud Cheaib v Kirill Fadeev | W | 3-1 |
| Challenger Series TT | 2023/01/06 11:30 | David Kumpel v Dauud Cheaib | W | 0-3 |
| Challenger Series TT | 2023/01/06 07:30 | Daniel Rinderer v Dauud Cheaib | W | 1-3 |
| Challenger Series TT | 2023/01/05 19:30 | Dauud Cheaib v Salim Karam | W | 3-0 |