1970: The Tiebreaker Is Introduced

Tennis Fans Voice Approval 01 'Sudden Death' Tiebreaker - The New York Times

Argentina vs. France: Who has the edge in marquee World Cup Final?

1970 Stanley Cup Finals - Wikipedia

Penalty shootout: Rules and all you need to know

Untying the standings: the history of the NFL playoff tiebreaker systems – Quirky Research

$176,000 U.S. Open Tennis Starts Today With Tiebreaker Adding to Drama - The New York Times

Untying the standings: the history of the NFL playoff tiebreaker systems – Quirky Research

Game, set and (an epic) match

Tennis fifth set tiebreak rules: Kevin Anderson beats John Isner Wimbledon semi-final