The Brazil international sustained an issue during the midweek Champions League victory over FC Midtjylland and is therefore set to miss Liverpool’s next three fixtures.
“After the international break he will back for sure, we just don’t know exactly when,” Klopp said.
“It’s a minor thing. It’s not something which will take him out for ages.”
With Virgil van Dijk also sidelined and Joel Matip having not featured since the Merseyside derby a fortnight ago, the boss was asked how he will decide which of Billy Koumetio, Nathaniel Phillips and Rhys Williams starts against West Ham United on Saturday.