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What is the tie-breaker procedure if a player won in extra time?

If a player wins a game in extra time, bringing the match score to a tie, players present their teams and their decks (without sideboarding) as though they were about to start another game, and then resolve the tiebreaker procedure.
Source: Wizards of the Coast (2019-11-21)    【Link to Ruling】
Tags: Tie-Break