BOSTON — Patrice Bergeron, who missed the Bruins’ season opening-win over Nashville on Thursday with an undisclosed injury, has another day to recover, but it seems very iffy that he’ll be ready to return for Mondy’s Garden visit by the Colorado Avalanche.

“I wouldn’t say doubtful, yet,” said Bruins Coach Bruce Cassidy of Bergeron’s availability. “We’re going to re-assess in the morning. The more time he’s away from practice, the more doubtful he looks.”

With just one game in the books the Bruins are already dealing with key injuries and uncertainty up front, on defense and on the penalty kill. There are question marks regarding Bergeron, as well as forward Austin Czarnik (illness) and defenseman Torey Krug (broken jaw) that could cause ripples throughout the lineup.

If Bergeron does not play, Ryan Spooner could be the choice to play between Brad Marchand and David Pastrnak.

Czarnik and Krug took part in practice over the weekend and are close.

“They made it through (practice), so they’re feeling better,” said Cassidy. “That’s another (set of injured players) we’ll take a look at. But obviously taking part in practice allows you to be a step closer to playing. That’ll be a decision probably made (Monday) morning.”

Krug was hit by a puck in practice on Sept. 19. He’s been able to skate much of the time since, and is playing with an extra protective shield for the lower half of his face. He hasn’t even been able to eat solid foods yet, but he is itching to be part of the up-tempo game the Bruins are now playing.

“That’s the game that I’ve been trying to play since I came into the league,” said Krug. “It only took five years for our team to get on the same page. It’s something exciting, to be a part of something where everyone is aggressive and assertive. It’s a fun thing to be part of this group.”

Czarnik had the misfortune of picking up a virus from his brother when the pair met in Detroit at the Bruins-Wings exhibition game on Sept. 23. He’s feeling better, getting stronger and has skated the past three days.

“(About Monday), we just don’t know yet,” said Czarnik. “I’m trying to get better every single day. It was some type of virus that took over. It was a tough couple of days for me, but I’m starting to feel good. (Saturday) was the best day so far.

“It’s frustrating, but you can’t control what happens with your body.”

While questions abound about the precise makeup of three of the Bruins lines, it’s a safe bet Cassidy will continue with the threesome of David Krejci, Jake DeBrusk and Anders Bjork, which was put together during Thursday’s game and played well.

SUNDAY’S GAME

RANGERS 2, CANADIENS 0: Brady Skjei and Mika Zibanejad scored, Henrik Lundqvist stopped 34 shots for his 62nd career shutout and host New York picked up its first win of the season. Lundqvist was stellar in getting his 406th career win one night after getting pulled in the first period.