| TT Cup (2022) | 2022/04/24 10:50 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-0 |
| TT Cup (2022) | 2022/04/24 09:20 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-2 |
| TT Cup (2022) | 2022/04/16 06:50 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-0 |
| TT Cup (2022) | 2022/04/10 12:50 | Alexander Tkachenko v Nazar Kovalchuk | L | 1-3 |
| TT Cup (2022) | 2022/04/05 09:50 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-0 |
| TT Cup (2022) | 2022/04/04 06:20 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-0 |
| TT Cup (2022) | 2022/03/29 13:20 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-2 |
| TT Cup (2022) | 2022/03/28 12:50 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-2 |
| TT Cup (2022) | 2022/03/22 08:20 | Alexander Tkachenko v Nazar Kovalchuk | L | 1-3 |
| TT Cup (2022) | 2022/03/21 10:50 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-2 |
| 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 | 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 | 2020/06/18 23:05 | Nazar Kovalchuk v Alexander Tkachenko | W | 0-3 |
| TT Cup Ukraine | 2020/06/17 23:05 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-0 |
| TT Cup Ukraine | 2020/06/16 10:40 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-0 |
| TT Cup Ukraine | 2020/06/15 13:00 | Nazar Kovalchuk v Alexander Tkachenko | L | 3-2 |