| TT Cup (2020) | 2020/11/12 12:25 | Alexander Tkachenko v Nazar Kovalchuk | L | 1-3 |
| TT Cup Ukraine | 2020/11/12 11:50 | Alexander Tkachenko v Nazar Kovalchuk | W | 3-0 |
| TT Cup Ukraine | 2020/11/11 08:20 | Nazar Kovalchuk v Alexander Tkachenko | W | 1-3 |
| TT Cup Ukraine | 2020/07/30 10:50 | Alexander Tkachenko v Nazar Kovalchuk | L | 0-3 |
| TT Cup Ukraine | 2020/07/29 10:15 | Alexander Tkachenko v Nazar Kovalchuk | W | 3-1 |
| TT Cup Ukraine | 2020/06/30 16:30 | Alexander Tkachenko v Nazar Kovalchuk | L | 1-3 |
| TT Cup Ukraine | 2020/06/30 14:45 | Alexander Tkachenko v Nazar Kovalchuk | W | 3-2 |
| TT Cup Ukraine | 2020/06/29 13:40 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-0 |
| TT Cup Ukraine | 2020/12/20 11:50 | Alexander Tkachenko v Yuryi Shchepanskyi | L | 2-3 |
| TT Cup Ukraine | 2020/12/20 10:40 | Serhii Tsybulin v Alexander Tkachenko | L | 3-1 |
| TT Cup Ukraine | 2020/12/20 08:55 | Volodymyr Lushnikov v Alexander Tkachenko | W | 2-3 |
| TT Cup Ukraine | 2020/12/20 07:10 | Evgeniy Pismenniy v Alexander Tkachenko | L | 3-1 |
| TT Cup Ukraine | 2020/12/19 12:25 | Volodymyr Lushnikov v Alexander Tkachenko | L | 3-1 |
| TT Cup Ukraine | 2020/12/19 11:50 | Alexander Tkachenko v Evgeniy Pismenniy | L | 1-3 |
| TT Cup Ukraine | 2020/12/19 10:40 | Alexander Tkachenko v Yuryi Shchepanskyi | W | 3-2 |
| TT Cup Ukraine | 2020/12/19 09:30 | Alexander Tkachenko v Yuryi Shchepanskyi | L | 1-3 |
| TT Cup Ukraine | 2020/12/20 14:35 | Yevhen Masko v Nazar Kovalchuk | W | 2-3 |
| TT Cup Ukraine | 2020/12/20 13:25 | Yevhen Masko v Nazar Kovalchuk | L | 3-2 |
| TT Cup Ukraine | 2020/12/20 12:15 | Oleksandr Levadniy v Nazar Kovalchuk | L | 3-1 |
| TT Cup Ukraine | 2020/12/20 10:30 | Roman Cherevko v Nazar Kovalchuk | L | 3-2 |
| TT Cup Ukraine | 2020/12/20 08:10 | Roman Derypaska v Nazar Kovalchuk | W | 1-3 |
| TT Cup Ukraine | 2020/12/20 05:50 | Nikita Trofimov v Nazar Kovalchuk | L | 3-1 |
| TT Cup (2020) | 2020/12/19 14:35 | Nikita Trofimov v Nazar Kovalchuk | L | 3-1 |
| TT Cup Ukraine | 2020/12/19 14:00 | Nazar Kovalchuk v Nikita Trofimov | W | 3-1 |