| TT Cup | 2021/04/03 19:20 | Zaychenko, Valentin v Andrei Kostiuk | L | 0-3 |
| TT Cup | 2021/04/03 13:30 | Andrei Kostiuk v Zaychenko, Valentin | W | 2-3 |
| TT Cup | 2021/03/18 18:35 | Zaychenko, Valentin v Andrei Kostiuk | L | 1-3 |
| TT Cup | 2021/03/17 15:05 | Zaychenko, Valentin v Andrei Kostiuk | L | 2-3 |
| TT Cup | 2021/03/09 15:40 | Andrei Kostiuk v Zaychenko, Valentin | L | 3-2 |
| TT Cup | 2021/03/08 14:30 | Andrei Kostiuk v Zaychenko, Valentin | L | 3-1 |
| TT Cup | 2021/06/18 14:05 | Zaychenko, Valentin v Reznichenko, Roman | L | 0-3 |
| Ukraine Win Cup | 2021/06/13 09:30 | Moroz, Kostiantyn v Zaychenko, Valentin | L | 3-2 |
| Ukraine Win Cup | 2021/06/13 08:30 | Naida, Alexander v Zaychenko, Valentin | L | 3-2 |
| Ukraine Win Cup | 2021/06/13 07:00 | Pirveli, Rodion v Zaychenko, Valentin | L | 3-1 |
| Ukraine Win Cup | 2021/06/13 06:30 | Zaychenko, Valentin v Moroz, Kostiantyn | L | 1-3 |
| Ukraine Win Cup | 2021/06/13 05:30 | Zaychenko, Valentin v Naida, Alexander | W | 3-2 |
| Ukraine Win Cup | 2021/06/13 05:00 | Zaychenko, Valentin v Pirveli, Rodion | L | 2-3 |
| TT Cup | 2021/06/05 12:20 | Grushko, Vadim v Zaychenko, Valentin | L | 3-2 |
| TT Cup | 2021/06/18 13:30 | Naida, Alexander v Andrei Kostiuk | W | 2-3 |
| TT Cup | 2021/06/18 12:55 | Andrei Kostiuk v Reznichenko, Roman | L | 2-3 |
| TT Cup | 2021/06/12 11:45 | Andrei Kostiuk v Alekseenko, Dmytro | L | 1-3 |
| TT Cup | 2021/06/12 10:35 | Andrei Kostiuk v Alekseenko, Dmytro | W | 3-0 |
| TT Cup | 2021/06/12 09:25 | Andrei Kostiuk v Grushko, Vadim | L | 2-3 |
| TT Cup | 2021/06/12 08:15 | Andrei Kostiuk v Eduard Rubtsov | L | 2-3 |
| TT Cup | 2021/06/12 07:05 | Andrei Kostiuk v Pirveli, Rodion | L | 2-3 |
| TT Cup | 2021/06/11 11:10 | Andrei Kostiuk v Grushko, Vadim | L | 0-3 |