What may decide winner of cup, about right after draw

• Walk-off home run, often
• Tennis "overtime"
• It settles the score
• Third game, perhaps
• Crucial vote
• A shoot-out, e.g

Wikipedia Word definitions in Wikipedia
In games and sports , a tiebreaker or tiebreak is used to determine a winner from among players or teams that are tied at the end of a contest, or a set of contests.

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Finally, complete the tiebreaker , saying in up to 20 words why you'd like to win first prize. ▪ Instead, there was a tiebreaker . ▪ The tiebreaker will be inPart 3, our December 1992 issue. ▪ The muscular Stoliarov pulled out ...

Wiktionary Word definitions in Wiktionary
n. Something that is used to pick a winner from a tied situation.

WordNet Word definitions in WordNet
n. overtime play in order to break a tie; e.g. tennis and soccer