Klopp admits his old coach at Mainz, Wolfgang Frank, would have the squad study AC Milan training videos.
He told Sky Sports: "I can take from a lot of people a lot of things, but the only real opportunity is when you work together with them.
"So I'm an admirer - without knowing him, I only one had a phone conversation - of Arrigo Sacchi. I knew him of course, but I got a bit more involved in his work when my former manager Wolfgang Frank brought up all of his videos.
"I think I saw 20, 30 or 500 training sessions of AC Milan in that time, because my former coach recorded them and showed them to us!"