Ottawa Senators pulled off the upset to defeat Montreal Canadiens. Ottawa Senators entered the game as the underdog, with a 34% chance to win before the game started.
From the outset, Ottawa Senators refused to go away, chipping away at Montreal Canadiens's lead until Ottawa Senators took their first lead at the very end of the game. Montreal Canadiens never recovered after losing the lead, and by the time the game ended, Ottawa Senators had earned the upset.