Liverpool have confirmed they will be without centre-back Joel Matip for the rest of the season.
The Reds have now lost three central defenders to long term injuries.
The latest blow means they are down to no senior defenders from their squad at the start of the season.
Klopp told the club website: "Unfortunately, we found out now after everybody looked at it that Joel will be out for the rest of the season.
"But he will be ready for the start of the next pre-season and finally everything will be sorted."