For three seasons, Jeremy Swayman and Linus Ullmark established themselves as arguably the best goalie tandem in the NHL. Beyond that, they forged a close friendship — with their on-ice embraces punctuating every Bruins victory as “Dirty Water” bellowed out of the TD Garden speakers.

It’s a divisional clash between the host Boston Bruins and visiting Ottawa Senators at TD Garden, and it will mark the first time that former Bruins goaltender Linus Ullmark takes the ice against his former club since the trade over the offseason that sent him to the Senators.