Liverpool defender Jarell Quansah admits he studies the game's greatest defensive talents.
Quansah says he is always trying to learn so to improve his own game.
I used to get high-cam footage instead of TV footage so you could see everything; how the back line moves and a little bit of everything," he said.
You just need to ask the right people. The way I learn is watching players. These players have played 400 to 500 games at the top level.
It would be stupid for me not to watch them. It'd be like having a resource and just throwing it away, I couldn't live with myself if I did that.
Virgil [van Dijk] makes everything look so easy, doesn't he, and even when you're next to him it is the same. It's 24/7 learning really."