Liverpool boss Jurgen Klopp says Dejan Lovren will return within the next three weeks.

The stopper only returned to Melwood last Monday after reaching the World Cup final with Croatia.

Lovren was not involved in Sunday's 4-0 win over West Ham, and Klopp believes the 29-year-old will spend more time on the sidelines.

"He is not fit. Let me say it like this, last year he already had a few problems with that but he could obviously play - and played really good," Klopp told Liverpool's official website.

"Recovery days were always enough then it was not a problem and he was in the next session again. We did not train a lot in the end of the season, of course, because we were more or less constantly playing, but he played constantly.

"Now in the World Cup, [playing] three times [for] 120 minutes it got a bit worse, but I am pretty sure it will settle in the next one, two or three weeks.

"In that time he can probably for sure train already, but not the full programme, so that will then take time.

"In the end, it is serious but not that serious. In the moment he is not available, that's true."