The Brazilian goalkeeper picked up the problem during Friday’s 4-1 victory over Norwich City at Anfield and was forced off towards the end of the first half.
Summer signing and back-up goalkeeper Adrian came on in his place, and Klopp has now confirmed that Alisson is set for a few weeks on the sidelines with the calf problem.
Speaking in an interview with Liverpool FC’s website, Klopp said: “[It’s] not too cool. It’s a calf injury which takes him obviously out for a while.
“I don’t want to make now [an] exact prognosis on when he will be back but it will not be Wednesday for sure, so now then we have to see. It takes a while, it takes a couple weeks for sure, and we have to see.
“I saw already like ‘six weeks’ and stuff like this, but Ali was not a lot injured in his career so I would like to wait a little bit to see how he develops in that process now, but he is not in for the next few weeks.”
The news means that Alisson will miss Liverpool FC’s Uefa Super Cup showdown with Chelsea FC in Istanbul on Wednesday night.
Alisson returned late to Liverpool FC this summer after his exploits at the Copa America with Brazil as he helped his national team to win the competition.
The Reds will return to Premier League action this weekend when they take on Southampton away from home on Saturday afternoon.
The Merseyside outfit will have their sights firmly set on challenging for the Premier League title once again this term after they missed out on the trophy by a single point last season.
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