Liverpool boss Jurgen Klopp has declared Arrigo Sacchi one of his big inspirations.
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!"