championship game; finals; deciding round
Refers to the final match or round that determines the winner of a tournament or competition.
明日はいよいよ決勝戦だ。
Tomorrow is finally the championship game.
彼は決勝戦で優勝した。
He won the championship in the finals.
They advanced to the finals for the first time.
She clinched the championship in the finals.
The team earned the right to compete in the finals.