Goals for Toronto from Armando Cooper, Jozy Altidore and Nick Hagglund negated strikes from Dominic Oduro and Ignacio Piatti on Wednesday at BMO Field, drawing TFC level with the Impact 5-5 on aggregate and 2-2 on away goals — sending the series to extra time.
Oduro opened the scoring in the second leg, burying a Matteo Mancosu feed in the 24th minute to extend the Impact's lead after a 3-2 victory last week in Montreal.
But Cooper responded 13 minutes later, prodding home from close range after Hagglund got his head to a Sebastian Giovinco corner kick and forced a goal-line clearance.
And TFC made it 2-1 on the night moments before halftime as Altidore flicked a Giovinco corner inside the near post. With the goal, Altidore marked five straight playoff games on the score sheet.
It was a bruising first half between the Canadian rivals, with the tone set by a brutal collision between Altidore and Impact midfielder Hernan Bernardello that briefly left both players dazed.
Piatti returned the lead to Montreal in the 53rd minute, connecting with a Johan Venegas through ball and rolling a effort that barely crossed the goal line — though replays showed it may have actually been a Hagglund own goal, as the Toronto defender got the final touch while trying to intervene.
Either way, Hagglund earned redemption in the 68th minute as his towering header off a Justin Morrow cross set the stage for extra time.