Jurgen Klopp admitted he faces a goalkeeping shortage if Alisson Becker is ruled out for a lengthy period after suffering a calf injury in Liverpool's opening 4-1 win over Norwich on Friday night.

Alisson had to come off in the 39th minute against the Canaries having gone down clutching his calf after slipping while playing a goal kick and, though there was no immediate verdict on how serious the problem is, Klopp did not sound optimistic.

"It's the calf and that's it," the German said as he ruled the Brazilian out of facing Chelsea in the European Super Cup on Wednesday.

"He is a very confident guy," he said. "He came in and I don't think he wanted to only sit on the bench for the next couple of years. He made himself ready.

"So yes, it's a situation, but if you are in a situation like this you want to have somebody who played the league, who is experienced. He's 32, he's a calm guy, good with his feet. So a lot of good things.

"But you still don't want to have a situation where (only) one goalie is fit. That's how it is but we have to see."