| Czech Open | 2021/08/24 11:30 | Adam Klajber v Truls Moregard | L | 1-4 |
| Czech Open | 2021/08/23 13:20 | Mudit Dani v Adam Klajber | W | 0-4 |
| Czech Open | 2021/08/21 15:20 | Pinto, Daniele v Adam Klajber | W | 0-3 |
| Czech Open | 2021/08/21 08:40 | Promberger, Jonas v Adam Klajber | W | 2-3 |
| WTT Contender Tunis | 2021/10/28 18:30 | Patrick Franziska v Grebnev, Maksim | L | 3-1 |
| WTT Contender Tunis | 2021/10/27 19:00 | Truls Moregard v Grebnev, Maksim | W | 2-3 |
| WTT Contender Tunis | 2021/10/26 15:10 | Joao Geraldo v Grebnev, Maksim | W | 1-3 |
| WTT Contender Tunis | 2021/10/25 16:35 | Grebnev, Maksim v Hippler, Tobias | W | 3-1 |
| WTT Contender Tunis | 2021/10/24 17:30 | Florent Lambiet v Grebnev, Maksim | W | 0-3 |
| European Team Championships | 2021/10/03 15:45 | Patrick Franziska v Grebnev, Maksim | L | 3-2 |
| European Team Championships | 2021/10/03 13:35 | Benedikt Duda v Grebnev, Maksim | W | 2-3 |
| European Team Championships | 2021/10/02 10:45 | Grebnev, Maksim v Anton Kallberg | W | 3-0 |