The Reds resume their title defence this week in the first-leg of the round of 16.
And Klopp will look for a little inside knowledge as Liverpool look to quell Felix.
“I have the same opinion as 99% of people in the football world," he added. “He is outstanding, what a talent he is.
“He combines pretty much everything. Some of our coaches, Pep (Lijnders) and Vitor (Matos), I think they worked with him when he was a kid (at Porto). I will ask them.
“But he is a special, special talent.
“That early in his career, he is able to combine his technical skills with speed and awareness in small spaces. I never could do it, so it must be really difficult!
“He is a football intelligent guy on top of that with his movements. The package is really, really interesting."