The Flyers lost Saturday’s game against the Bruins 3-0, but they may now have a bigger problem.

Sam Ersson left midway through the first period after taking a toe shot and did not return. Aleksei Kolosov took over as backup goaltender and made 20 of 22 saves in relief as an admittedly more defensive-minded Flyers team continued to sputter offensively.

They are back to square one after Saturday’s defeat after battling their way to back-to-back wins for the first time all season this week, but now they may do so without the No. 1 goaltender who has given them at least a chance in each of his starts for a bit.

Head coach John Tortorella has emphasized that the Flyers need to figure out their backup goaltending situation, between Kolosov and Ivan Fedotov, as they enter November, but this is likely far from how the team envisioned.

And now the upcoming stretch could be tough, especially with a road trip to Carolina on deck against a Hurricanes team that just beat the same Bruins 8-2 on Thursday night.

“I’m not going to get ahead of myself with Sam because I really don’t know,” Tortorella said after the match.

“I thought we played hard for him, Koly,” Tortorella later added about Kolosov. “I don’t think there will be a problem at all. He has a certain personality in his game. He fights.”

Ersson kicked out his right leg to make a save on Boston defenseman Nikita Zadorov’s shot when the puck ricocheted off his toe and knocked the blade out of his skate.

Ersson stayed down during the stoppage to let a trainer throw the knife back in, but during the TV timeout that followed, he skated over to the Flyers bench to talk to head athletic trainer Tommy Alva and pointed to his right foot . Ersson entered the tunnel shortly afterwards, while Kolosov stepped onto the ice to warm up.

Ersson did not return and details were limited during the match and its immediate aftermath, although during the NBC Sports Philadelphia broadcast it was said that Ersson did indeed have an injury and Fedotov was dressing as an emergency backup, according to 97’s Kevin Durso, 3 ESPN.

After the game, the Flyers gave Ersson the lower-body injury designation.

Kolosov was quickly tested when a Pavel Zacha shot from the slot found its way to the front of the net and got lost in a scramble after the Bruins’ Justin Brazeau tried to dig in the rebound. Kolosov kept an eye on it all the way to keep the Flyers out of trouble and the game scoreless for the time being.

But after a Travis Sanheim scoring opportunity missed the target on a rush sparked by a Rasmus Ristolainen stretch pass to the far blue line and a patient Matvei Michkov waiting to make the feed to the Flyers’ invading defender, Boston pivoted the other way and scored when Matthew Poitras grabbed another rebound and managed to slip it through Kolosov’s pads to make it a 1-0 game with less than seven minutes left in the period.

The Bruins struck again midway through the second, when Justin Brazeau unleashed a blast from the right circle on a layup carry behind the Philadelphia net by Boston captain Brad Marchand.

Kolosov couldn’t follow it and the Flyers had no answer to the 2-0 deficit.

Boston maintained a 21-12 shot lead through two periods, and the chances the Flyers could muster were either pushed into difficult angles on the outside or stifled by the predictable tendency of them looking for the pass in the rush. Bruins goaltender Joonas Korpisalo, who made 20 saves in the shutout, and the Boston skaters in front of him quickly picked up on that pattern.