Starting goalie James Reimer was pulled in favor of Bernier after yielding four goals on 21 shots.
Bernier proceeded to blank the Senators the rest of the way, stopping all 15 shots he faced in regulation and overtime. He added two more saves in the tiebreaker as the Maple Leafs improved to 3-0-0 to begin a season for the third time in the last four years.
Craig Anderson made 38 saves for Ottawa, which fell to 1-0-1 on the young season.
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