The Flames are wrapping up a monster seven-game road trip, during which they've posted a 3-1-2 record. Like the B's, Calgary is on the second end of a back-to-back, having spoiled the Islanders' inaugural contest at the new UBS Arena on Saturday night with a 5-2 victory.
Calgary is second in the NHL in goals against, allowing just 2.00 goals per game.
"I expect they'll play a pretty typical Darryl Sutter type of game, not gonna be a ton of surprises," said Bruins coach Bruce Cassidy. "They're gonna be hard, they're gonna get to the front of the net, they're gonna protect the front of the net. They're gonna want to win the slot battle.
"I suspect they'll play behind our D early on, force us to break pucks out, play 200 feet. They're gonna manage it well between the blues. That's what I expect out of them. Will be a good game for us, kind of how we want to play."
Calgary is paced by stalwarts Johnny Gaudreau (7 goals, 14 assists in 18 games), Elias Lindholm (8 goals, 11 assists), and Mathew Tkachuk (8 goals, 7 assists) up front. Fifth-year winger Andrew Mangiapane, meanwhile, is on pace for a career season and leading the Flames with 14 goals 18 games, leaving him just four goals shy of his career-high set in 2020-21.
"Lindholm, Gaudreau, these are guys - Mangiapane - that can certainly create," said Cassidy. "Tkachuk will get to the net and be ornery, just like we have some guys that can create. In general, they're a strong defensive team, play sound in front of their goaltender. We like to think we play that way as well. Should be a good challenge in that regard."
The Flames rely heavily on goaltender Jacob Markstrom, who picked up the win on Long Island to improve to 7-3-4 with a 1.71 goals against average and .942 save percentage this season. Old friend Daniel Vladar, who was traded to the Flames in July and is 3-0-1 with a 1.96 GAA and .933 save percentage, could get the start on Sunday in the second end of the back-to-back.
"I'm happy it's going well for him," Cassidy said of Vladar, who spent the first five years of his professional career in Boston. "He was a good Bruin, worked hard. A couple of tough injuries that limited his time in Providence more than anything. Came over here at a young age. Great kid. Him and Swayman, equally hard-working kids.
"Played some good games for us. I'm happy for him. I hope our guy outplays him tonight, don't get me wrong. But I've got nothing bad to say about Vladdy. He's a good pro. He's well-liked in the room. He's got some talent.
"I think he's in a good spot behind a guy like Markstrom that plays a lot so he can sort of learn his craft at the NHL level without being forced to be the guy. Good for him. I'm sure Sway's gonna want to put his best foot forward against him. Should be a good battle of young goalies."