| Challenger Series TT | 2022/07/29 12:50 | Liang Qiu v Dennis Klein | W | 0-3 |
| Challenger Ochsenhausen | 2022/07/28 17:10 | Liang Qiu v Dennis Klein | W | 0-3 |
| Challenger Ochsenhausen | 2021/12/03 12:25 | Dennis Klein v Liang Qiu | W | 3-2 |
| Challenger Ochsenhausen | 2021/12/02 08:10 | Liang Qiu v Dennis Klein | W | 2-3 |
| Challenger Ochsenhausen | 2021/11/01 07:30 | Dennis Klein v Liang Qiu | W | 3-2 |
| Challenger Ochsenhausen | 2021/06/28 06:30 | Liang Qiu v Dennis Klein | W | 2-3 |
| Challenger Ochsenhausen | 2021/02/25 08:10 | Liang Qiu v Dennis Klein | L | 3-0 |
| Challenger Ochsenhausen | 2021/02/22 13:30 | Dennis Klein v Liang Qiu | L | 1-3 |
| Challenger Series TT | 2023/07/06 14:30 | Hannes Hormann v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2023/07/06 11:50 | Johannes Willeke v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2023/07/06 09:50 | Dennis Klein v David Reitspies | W | 3-0 |
| Challenger Series TT | 2023/07/06 07:50 | Dennis Klein v Dauud Cheaib | W | 3-1 |
| Challenger Series TT | 2023/07/04 13:30 | Dennis Klein v Benjamin Fruchart | W | 3-2 |
| Challenger Series TT | 2023/07/04 11:25 | Kirill Fadeev v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2023/07/04 09:10 | Dennis Klein v Mathias Golab | W | 3-0 |
| Challenger Series TT | 2023/07/03 19:50 | Dennis Klein v Benjamin Fruchart | L | 0-3 |
| Challenger Series TT | 2023/07/06 15:10 | Dauud Cheaib v Liang Qiu | W | 2-3 |
| Challenger Series TT | 2023/07/06 12:30 | Hannes Hormann v Liang Qiu | W | 0-3 |
| Challenger Series TT | 2023/07/06 11:10 | Benjamin Fruchart v Liang Qiu | L | 3-1 |
| Challenger Series TT | 2023/07/06 06:30 | Johannes Willeke v Liang Qiu | L | 3-2 |
| Challenger Series TT | 2023/06/30 12:50 | Liang Qiu v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/06/30 11:25 | Liang Qiu v Kirill Fadeev | L | 2-3 |
| Challenger Series TT | 2023/06/30 10:30 | Liang Qiu v Bohdan Sinkevych | W | 3-0 |
| Challenger Series TT | 2023/06/30 07:50 | Liang Qiu v Dauud Cheaib | L | 1-3 |