Former Liverpool midfielder Marko Grujic has revealed he was quizzed on Luis Diaz by current members of Jurgen Klopp's side after the Reds' Champions League win over Porto in November.
Grujic, who made a total of 16 first-team appearances during his Anfield stay, joined the Portuguese side on a permanent basis last summer after spending the previous season on loan at the club.
Operating within the same side as Diaz during this period, the Serbia international has become accustomed to the high performance levels of the Colombian star.
