| Challenger Series TT | 2023/07/07 11:25 | Dennis Klein v Liang Qiu | W | 3-1 |
| Challenger Series TT | 2023/07/06 17:10 | Dennis Klein v Liang Qiu | W | 3-1 |
| 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 Series TT | 2023/11/14 07:30 | Dennis Klein v Martin Baechler | W | 3-0 |
| Challenger Series TT | 2023/11/13 18:50 | Dennis Klein v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/11/13 17:30 | Dennis Klein v Vidit Desai | W | 3-0 |
| Challenger Series TT | 2023/11/13 12:50 | Dennis Klein v Akito Itagaki | W | 3-1 |
| Challenger Series TT | 2023/11/13 10:10 | Dennis Klein v Alexander Valuch | W | 3-0 |
| Challenger Series TT | 2023/11/13 07:30 | Dennis Klein v Sven Happek | W | 3-0 |
| Challenger Series TT | 2023/10/17 12:50 | Simon Berglund v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2023/10/17 11:25 | Dauud Cheaib v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2023/11/14 09:30 | Liang Qiu v Sven Happek | W | 3-0 |
| Challenger Series TT | 2023/11/13 19:30 | Liang Qiu v Martin Baechler | W | 3-0 |
| Challenger Series TT | 2023/11/13 16:50 | Dauud Cheaib v Liang Qiu | L | 3-2 |
| Challenger Series TT | 2023/11/13 14:50 | Liang Qiu v Vidit Desai | W | 3-1 |
| Challenger Series TT | 2023/11/13 10:50 | Liang Qiu v Akito Itagaki | W | 3-0 |
| Challenger Series TT | 2023/11/13 08:10 | Liang Qiu v Alexander Valuch | W | 3-1 |
| Challenger Series TT | 2023/10/10 09:50 | Liang Qiu v Alexander Valuch | L | 2-3 |
| Challenger Series TT | 2023/10/10 06:30 | Liang Qiu v Rafael Turrini | L | 0-3 |