Matip will move to Anfield in the summer on a free transfer.
“I am very happy. Everybody who knows him would have been interested,” Klopp told Liverpool’s official website.
“Maybe he’s not the most famous player in England, but he’s 24 and has played about 200 Bundesliga games for Schalke.
“He is a top-class centre-half, very young but experienced. You don’t have that too often. To be honest, when I had my break I thought for the next club, I should think about Joel, if there was a need.”
