| TT Cup Ukraine | 2021/12/23 13:00 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-0 |
| TT Cup Ukraine | 2021/12/23 07:45 | Alexander Tkachenko v Nazar Kovalchuk | L | 1-3 |
| TT Cup Ukraine | 2021/12/22 11:50 | Nazar Kovalchuk v Alexander Tkachenko | W | 1-3 |
| TT Cup Ukraine | 2021/03/07 17:05 | Alexander Tkachenko v Nazar Kovalchuk | W | 3-1 |
| TT Cup Ukraine | 2021/03/06 17:05 | Alexander Tkachenko v Nazar Kovalchuk | L | 1-3 |
| 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 | 2022/02/23 12:25 | Andrii Baklykov v Alexander Tkachenko | W | 1-3 |
| TT Cup Ukraine | 2022/02/23 10:05 | Yuryi Shchepanskyi v Alexander Tkachenko | L | 3-2 |
| TT Cup Ukraine | 2022/02/23 09:30 | Alexander Tkachenko v Vladislav Kalugin | W | 3-2 |
| TT Cup Ukraine | 2022/02/23 08:20 | Vladyslav Sluzenko v Alexander Tkachenko | W | 2-3 |
| TT Cup Ukraine | 2022/02/23 07:10 | Alexander Tkachenko v Andrii Baklykov | L | 0-3 |
| TT Cup Ukraine | 2022/02/20 15:10 | Alexander Tkachenko v Vladyslav Sluzenko | W | 3-2 |
| TT Cup Ukraine | 2022/02/20 12:50 | Alexander Tkachenko v Denis Vakulenko | W | 3-2 |
| TT Cup Ukraine | 2022/02/20 11:05 | Alexander Tkachenko v Andrii Datsenko | W | 3-2 |
| TT Cup Ukraine | 2022/02/25 13:15 | Anatolii Lievshin v Nazar Kovalchuk | W | 1-3 |
| TT Cup Ukraine | 2022/02/25 11:30 | Volodymyr Plishylo v Nazar Kovalchuk | W | 2-3 |
| TT Cup Ukraine | 2022/02/25 10:55 | Nazar Kovalchuk v David Simonchuk | W | 3-2 |
| TT Cup Ukraine | 2022/02/25 08:35 | Nazar Kovalchuk v Anton Molochko | L | 1-3 |
| TT Cup Ukraine | 2022/02/25 06:50 | Nazar Kovalchuk v Anatolii Lievshin | L | 2-3 |
| TT Cup Ukraine | 2022/02/24 12:40 | David Simonchuk v Nazar Kovalchuk | W | 1-3 |
| TT Cup Ukraine | 2022/02/24 12:05 | David Simonchuk v Nazar Kovalchuk | L | 3-2 |
| TT Cup Ukraine | 2022/02/24 09:45 | Anatolii Lievshin v Nazar Kovalchuk | W | 1-3 |