（当两队在比赛结束时打成平局而增加的）决胜局，加时赛extra play at the end of a game or stage in a game, or an extra question at the end of a quiz, when both or all teams or players have the same points, to decide who is the winner
The Spaniard won the fourth-set tie-breaker.
As a tie breaker, we asked everyone to guess the price of the vase.
She missed only one first serve in the tie-break.