| Challenger Ochsenhausen | 2021/11/16 12:40 | Adam Klajber v Sudhanshu Grover | L | 1-3 |
| Challenger Ochsenhausen | 2021/11/16 10:00 | Adam Klajber v Dennis Klein | L | 0-3 |
| Challenger Ochsenhausen | 2021/11/15 21:00 | Adam Klajber v Dauud Cheaib | L | 0-3 |
| Challenger Ochsenhausen | 2021/11/15 16:20 | Adam Klajber v Putuntica, Andrei | L | 1-3 |
| Challenger Ochsenhausen | 2021/11/15 13:30 | Adam Klajber v Chamorro, Miguel | L | 0-3 |
| Challenger Ochsenhausen | 2021/11/15 10:10 | Guilherme Teodoro v Adam Klajber | L | 3-0 |
| Challenger Ochsenhausen | 2021/11/15 08:10 | Adam Klajber v Chtchetinine, Evgueni | L | 0-3 |
| Oman Open U21 Women | 2021/11/12 11:40 | Sidorenko, Vladimir v Adam Klajber | W | 3-4 |
| Austria Top 12 | 2021/12/13 17:00 | Alexander Chen v Daniel Habesohn | L | 1-3 |
| WTT Contender Novo Mesto | 2021/11/09 18:10 | Alexander Chen v Steger, Bastian | L | 1-3 |
| WTT Contender Novo Mesto | 2021/11/09 10:20 | Alexander Chen v Cvetko, Tilen | W | 3-2 |
| WTT Contender Lasko | 2021/11/02 18:45 | Alexander Chen v Eric Jouti | L | 2-3 |
| WTT Contender Lasko | 2021/11/02 12:05 | Alexander Chen v Aidos Kenzhigulov | W | 3-2 |
| WTT Contender Tunis | 2021/10/24 18:40 | Alexander Chen v Andreas Levenko | L | 1-3 |
| ITTF Kazakhstan Open | 2021/09/18 08:30 | Kirill Gerassimenko v Alexander Chen | L | 4-0 |
| ITTF Kazakhstan Open | 2021/09/17 09:00 | Raiter Erik v Alexander Chen | W | 2-4 |