The Boston Bruins first line of Brad Marchand, Patrice Bergeron and David Pastrnak is clicking on all cylinders without a doubt, the other lines not so much. 

David Krejci has one assist so far this season along with only two shots on goal and is sitting at -1.

Head coach Bruce Cassidy hasn't been too impressed with the lines lack of chemistry so far speaking after Monday's win. 

“Yeah, some of the line combinations,” said Cassidy “There were a couple lines tonight that I thought could’ve been better, and they’re going to have to sort out their chemistry in their own end and how they’re going to attack.”

On the flip side, Cassidy is happy with David Backes centering the third line. 

“I kind of like Backs [David Backes] in the middle. I think [Anders] Bjork had his legs under him tonight. Anders just has to learn how to manage the puck, when to make plays, when not to hang onto it because he’s got it a lot,” said Cassidy, of a line that combined for eight shot attempts in Monday’s win over the Sens. “it’s just for him to figure out, okay if I do give it up in this league it’s tough to get it back, so we’d like him to possess it even more.

I liked his speed. Danton’s [Heinen] game was coming. He was very responsible, so I thought that line worked out well for us. David can only speak to how he liked being in the middle of the ice. It’s one game, but certainly, that’ll be the plan going forward unless something changes in the next few days.”

Hopefully Krejci can get it going soon as the B's can't rely on the first line all season. 

Source: NBC Sports Boston