The 25-year-old, who has missed training for a few days, needs to have his games managed as he deals with a persistent injury problem Jurgen Klopp has explained why Liverpool have to adopt a cautious approach to selecting Joel Matip on a matchday given his ankle issues. The centre-back, who joined the Anfield side on a free transfer from Schalke in the summer, has been a revelation in their rearguard.