Jurgen Klopp has admitted that Alisson’s latest injury is ‘rather serious’.
Liverpool’s first-choice goalkeeper remains sidelined for Saturday’s trip to Nottingham Forest after picking up a hamstring issue in training last month.
Caoimhin Kelleher will continue to deputise for the Brazil international, who is missing a fifth straight game for Klopp’s side at the City Ground this weekend.
And the Reds’ manager conceded that while Alisson is expected to feature again before the end of this season, his road to recovery is by no means straightforward.
“There is no real timescale on it, but it is a proper muscle injury,” said Klopp.
“Different players recover differently. That is it pretty much. It is not a short one.
“It is not that he will be in contention for next week or something like that. We have to wait a few more weeks, definitely, for him.
“He is working in the gym, not on the pitch, it is a rather serious one but not a season-ending injury.”
Kelleher’s stand-in stint coincided with Liverpool claiming the first trophy of this season by overcoming Chelsea in last weekend’s Carabao Cup final at Wembley.
Speculation abounded last summer that the Irishman would bring his Anfield stay to an end in order to pursue more regular first-team opportunities elsewhere.
But Klopp insists that he never had any thoughts about parting with Kelleher; a fact now vindicated by his current importance to the Premier League leaders.
He added: “For me it was never a discussion, we spoke about it but for me there was no chance of him leaving so I was not interested in who was asking.
“It would have had to be a proper price to give us a chance of doing something in a difficult market.
“It is not like other goalkeepers moving from A to B for £15m or £20m that is totally unrealistic and nonsense in how I understood it.”