Liverpool boss Jurgen Klopp isn't surprised by Roberto Firmino's impact this season.

Klopp was well aware of the threat posed by Firmino when he was at his previous club Hoffenheim and featured against the Liverpool manager's Borussia Dortmund side on many occasions.

“The difference is not too big because I knew Roberto before I came here and he is a very good player.

“I played [against him] a number of times when he was at Hoffenheim so I knew a lot about him.

“The only thing what he shows now is this mixture of talent and attitude. He's a really good player and he loves what he is doing."