Final score: Islanders 4, Bruins 3, in OT.
Winning goal: Casey Cizikas on a breakaway, at 14:48 of OT.
Key statistic
Semyon Varlamov went 19-11-4 with a 2.04 goals-against average, a .929 save percentage and seven shutouts in the regular season but was 0-2 with a 3.62 GAA and .903 save percentage in the playoffs entering Game 2.
Turning point
The Islanders were dominating overtime, but Varlamov had to make a save on David Krejci and then another on Taylor Hall on the rebound, to keep the game going at 13:06 of OT.