| TT Cup | 2021/03/18 08:10 | Tsybulin, Sergey v Kovalchuk, Nazar | L | 3-0 |
| TT Cup | 2021/03/17 07:40 | Tsybulin, Sergey v Kovalchuk, Nazar | L | 3-0 |
| TT Cup | 2021/03/11 08:10 | Tsybulin, Sergey v Kovalchuk, Nazar | W | 2-3 |
| TT Cup | 2021/03/10 08:10 | Kovalchuk, Nazar v Tsybulin, Sergey | W | 3-0 |
| TT Cup | 2021/03/04 08:45 | Tsybulin, Sergey v Kovalchuk, Nazar | W | 1-3 |
| TT Cup | 2021/03/03 10:30 | Kovalchuk, Nazar v Tsybulin, Sergey | W | 3-1 |
| TT Cup | 2020/12/11 03:05 | Kovalchuk, Nazar v Tsybulin, Sergey | W | 3-0 |
| TT Cup | 2020/12/11 00:05 | Tsybulin, Sergey v Kovalchuk, Nazar | W | 1-3 |
| TT Cup | 2021/04/07 22:35 | Kovalchuk, Nazar v Levadniy, Aleksandr | W | 3-1 |
| TT Cup | 2021/04/07 21:35 | Kovalchuk, Nazar v Shkurupii, A. | L | 1-3 |
| TT Cup | 2021/04/06 11:40 | Kovalchuk, Nazar v Volodymyr Plishylo | W | 3-0 |
| TT Cup | 2021/04/06 11:05 | Danilyuk, Nazar v Kovalchuk, Nazar | L | 3-2 |
| TT Cup | 2021/04/06 08:45 | Gordiy, Andrey v Kovalchuk, Nazar | W | 2-3 |
| TT Cup | 2021/04/06 07:00 | Verbyany, Vasily v Kovalchuk, Nazar | L | 3-1 |
| TT Cup | 2021/04/06 05:50 | Volodymyr Plishylo v Kovalchuk, Nazar | W | 2-3 |
| TT Cup | 2021/04/02 12:15 | Kovalchuk, Nazar v Gordiy, Andrey | L | 1-3 |
| TT Cup | 2021/04/07 23:05 | Tsybulin, Sergey v Shkurupii, A. | L | 1-3 |
| TT Cup | 2021/04/07 22:05 | Krutko, Aleksey v Tsybulin, Sergey | L | 3-1 |
| TT Cup | 2021/04/07 21:05 | Tsybulin, Sergey v Levadniy, Aleksandr | L | 0-3 |
| TT Cup | 2021/04/03 13:35 | Boiko, Serhii v Tsybulin, Sergey | L | 3-2 |
| TT Cup | 2021/04/03 13:00 | Boiko, Serhii v Tsybulin, Sergey | L | 3-1 |
| TT Cup | 2021/04/03 11:15 | Tsybulin, Sergey v Pismenniy, Evgeniy | W | 3-1 |
| TT Cup | 2021/04/03 08:55 | Gogenko, Sergiy v Tsybulin, Sergey | L | 3-0 |
| TT Cup | 2021/04/03 06:35 | Roman Cherevko v Tsybulin, Sergey | L | 3-2 |