Alisson will miss Liverpool’s game against Bournemouth and their Champions League tie against Spanish side Atletico Madrid due to an injury.
The Brazilian was rested for Liverpool’s defeat to Chelsea on Tuesday and did not travel with the rest of the team to Stamford Bridge.
Klopp has revealed that Alisson felt the injury during a training session before the match and a subsequent scan picked up a problem with his hip.
‘Unfortunately Ali is out,’ Klopp said on Friday.
‘He had in training before the Chelsea game a little incident, we all thought it was nothing, it was clear he wasn’t going to play anyway, the plan was he was going to be on the bench.
‘We thought we didn’t have to take any risk and so we left him out of the squad. He had a scan the next day and they found something and he’s out.
‘We’ll see next week [against Atletico Madrid]. Next week, for sure we’ll see. A muscle in the hip region, a small muscle.
‘You could all do your work still but a professional goalkeeper it’s a slightly different situation.
Asked specifically about the Atletico Madrid clash, Klopp replied: ‘No, next week not [available].
‘I don’t want to say no [for the Merseyside derby] but I don’t know if he will be available. He is not available for the next week, not for tomorrow and not the next week.
‘Then we have to judge the situation new. I would say after the international break he is back 100 per cent, whatever we can get before that we will see.’