Chicago Blackhawks pulled off the upset to defeat Pittsburgh Penguins. Chicago Blackhawks entered the game as the decided underdog, with a 29% chance to win before the game started.
From the outset, Chicago Blackhawks refused to go away, chipping away at Pittsburgh Penguins's lead until Chicago Blackhawks took their first lead toward the end of the game. Pittsburgh Penguins never recovered after losing the lead, and by the time the game ended, Chicago Blackhawks had earned the upset.