| Ukraine - TT-Cup | 2021/08/25 09:15 | Samvel Melkumian v Oleksandr Kostiuk | L | 2-3 |
| Ukraine - TT-Cup | 2021/07/06 10:25 | Samvel Melkumian v Oleksandr Kostiuk | L | 0-3 |
| Ukraine - TT-Cup | 2021/06/28 00:45 | Oleksandr Kostiuk v Samvel Melkumian | W | 2-3 |
| Ukraine - TT-Cup | 2021/06/21 08:05 | Samvel Melkumian v Oleksandr Kostiuk | L | 0-3 |
| TT Cup | 2021/01/26 21:10 | Samvel Melkumian v Oleksandr Kostiuk | W | 3-1 |
| Ukraine - TT-Cup | 2021/01/26 18:15 | Oleksandr Kostiuk v Samvel Melkumian | L | 3-0 |
| Ukraine - TT-Cup | 2021/01/06 11:25 | Samvel Melkumian v Oleksandr Kostiuk | W | 3-2 |
| Ukraine - TT-Cup | 2020/12/19 16:40 | Samvel Melkumian v Oleksandr Kostiuk | L | 1-3 |
| Ukraine - TT-Cup | 2021/09/06 06:55 | Samvel Melkumian v Volodymyr Tuchkevych | W | 3-1 |
| Ukraine - TT-Cup | 2021/08/28 02:15 | Samvel Melkumian v Volodymyr Tuchkevych | W | 3-1 |
| Ukraine - TT-Cup | 2021/08/28 01:15 | Samvel Melkumian v Igor Demchuk | W | 3-1 |
| Ukraine - TT-Cup | 2021/08/28 00:45 | Samvel Melkumian v Roman Vashchuk | W | 3-0 |
| Ukraine - TT-Cup | 2021/08/27 23:15 | Volodymyr Tuchkevych v Samvel Melkumian | L | 3-1 |
| Ukraine - TT-Cup | 2021/08/27 22:45 | Samvel Melkumian v Igor Demchuk | W | 3-0 |
| Ukraine - TT-Cup | 2021/08/27 21:15 | Samvel Melkumian v Roman Vashchuk | W | 3-1 |
| Ukraine - TT-Cup | 2021/08/26 12:10 | Samvel Melkumian v Andrey Kaptanovsky | L | 0-3 |
| Ukraine - TT-Cup | 2021/09/06 06:20 | Andrey Tsikhotskiy v Oleksandr Kostiuk | L | 3-1 |
| Ukraine - TT-Cup | 2021/08/30 11:00 | Volodymyr Tuchkevych v Oleksandr Kostiuk | L | 3-0 |
| Ukraine - TT-Cup | 2021/08/30 09:50 | Andrey Kaptanovsky v Oleksandr Kostiuk | L | 3-2 |
| Ukraine - TT-Cup | 2021/08/30 09:15 | Oleksandr Kostiuk v Andrey Tsikhotskiy | L | 2-3 |
| Ukraine - TT-Cup | 2021/08/30 08:05 | Volodymyr Tuchkevych v Oleksandr Kostiuk | L | 3-1 |
| Ukraine - TT-Cup | 2021/08/30 06:55 | Andrey Kaptanovsky v Oleksandr Kostiuk | W | 0-3 |
| Ukraine - TT-Cup | 2021/08/30 05:45 | Andrey Tsikhotskiy v Oleksandr Kostiuk | L | 3-0 |
| Ukraine - TT-Cup | 2021/08/29 02:15 | Oleksandr Kostiuk v Andrey Tsikhotskiy | W | 3-2 |