The defender sustained a lower leg fracture during the 3-1 win at Burnley on December 5, forcing him to sit out the 10 fixtures that have followed since as he began a rehabilitation programme at Melwood.
Klopp told Liverpoolfc.com: “We have to wait. Obviously it was really unlucky in that situation. The injury is not like Trent or Gini where you know ‘that’s the only thing’. It could have been like that, but then more and more we found out it’s a more serious thing.