"[Lovren]’s landed awkwardly," McAllister said. "It didn’t look too good as he was stretchered off but fingers crossed I don’t think it’s as bad as it looked.
"[Firmino], like Dejan, landed badly. It was just a ball he went up for and he's landed on the base of his spine, just on his lower back.
"It's an awkward landing but he seems fine as well."
The Reds had 47 shots over the course of 120 minutes at Anfield but had to be taken all the way by the League Two side in order to advance.
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Gary McAllister was pleased with the amount of chances Liverpool created
"That’s what we will look at," McAllister continued.
"The positives are we’re through to the next round and we had around 50 shots at goal.
"We’ve been asking the players to step forward and take a wee bit more responsibility, putting themselves forward to take on a shot, and we had that tonight.
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"We just didn’t worry the ‘keeper enough. The players have got to trust themselves.
"The fact is they kept trying and no-one shied away from it.
"In the past couple of seasons, there might have been a criticism that Liverpool have tried to score the perfect goal and put together too many passes, but the fact is tonight we did step forward and had a few cracks at goal.”
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League Two side Carlisle took Liverpool to penalties in their third round Capital One Cup tie