Chicago Blackhawks pulled off the upset to defeat New York Islanders. Chicago Blackhawks entered the game as the underdog, with a 44% chance to win before the game started.
From the outset, Chicago Blackhawks refused to go away, chipping away at New York Islanders's lead until Chicago Blackhawks took their first lead at the very end of the game. New York Islanders never recovered after losing the lead, and by the time the game ended, Chicago Blackhawks had earned the upset.