Sehnal played for USK Praha of the Czech National Basketball League from 2014 to 2021.
[1] On August 9, 2021, he has signed with Löwen Braunschweig of the Basketball Bundesliga.
[2] Sehnal has been a member of the Czech national basketball team.
At a EuroBasket 2022 qualification game against Denmark, Sehnal scored 10 points while his coach Ronen Ginzburg assigned Sehnal with special defense assignments against the opponent's top players.
[3] Sehnal states that he grew up admiring Miloš Teodosić.