Klopp's first-choice CB pair at Dortmund were the same age, so that makes me think he would go for a CB of a similar age to Matip rather than a 20-21 year-old like Tah or Sule. Another factor is Joe Gomez; Klopp recently mentioned that he followed him even before he came to Liverpool, so he will definitely give him a chance – meaning there is already one young long-term CB project at the club.
Wasnt Hummels 19/20 years old when he moved to Dortmund?
Yeah, Joe Gomez is obviously a big factor here. Klopp seems to rate him highly and hopefully he can show that potential on the pitch.
Sule is probably ready to go straight into a first team defense though. I'd love to sign Van Dijk but he'll cost a shitload. As I've said earlier, should have signed him from Celtic. But if possible sign him up.