BOSTON — Ten days after the Senators embarassed them in Canada, the Bruins won the rematch in dramatic fashion.

With 5.5 seconds left in overtime Pavel Zacha poked the puck under Linus Ullmark to give Boston their fifth straight win, 3-2 on Thursday at TD Garden.

The Bruins head to Toronto, where they’ll face the Maple Leafs on Saturday at 8 p.m.

The game pitted Ullmark , the former Bruins goalie and ex-Senators netminder Joonas Korpisalo against each other and their old teams.

Ullmark was 2-0 vs. Boston last year

Ottawa scored on its first shot of the game, 5:42 into the first period, when Michael Amadio beat Joonas Korpisalo. The Bruins’ goalie didn’t see another shot until there was just over a minute left until the first intermission.

But Ullmark kept Boston off the board i

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