For their Champions League win against FC Midtjylland, a hamstring injury picked up by stand-in centre half Fabinho added to Liverpool's defensive injury crisis.
Klopp was asked after the game by a Brazilian journalist for an update and said it's a blow for the national team too.
Klopp replied: "I'm not sure if Tite's too worried because he plays him never so he will probably now not sit on the bench for the next three international games.
"For us it's obviously a proper blow but for now we don't know.
"Fab was not positive but not too negative as well so we will see, we have to wait for the scan tomorrow morning and then we will know more."