The Spurs defender has been absent with a thigh injury since their defeat at Bournemouth, but is working his way back to fitness ahead of the final on June 1.
“Sometimes now, everyone is too focused on playing football. And Sergio has that character you need to play that position," he told the Mirror.
“I watch video clips of him [Ramos], Franco Baresi, Paolo Maldini. Their aggression.
“After a few years, you have to realise that's important for some defenders. You have to admit, yes you play football, but at the same time, you must not forget you are a defender and have to fight. Put your face in where it hurts.
Sanchez has called on his teammates to fight harder than any of Jurgen Klopp's players next week.
“Sometimes just playing football is not enough," he said. "You have to do more. You have to run more. You have to 'crash' more. To – I don't know – cry more.
“We have to show everyone the right mentality," he added. "If we can't play our football, we have to have another way to do it.
“You can't be worried about what people say. If you have to crash, you have to crash. You don't care. You have to tackle. Football is not composed of just taking the ball, or clearing the ball, properly, without touching the opponent?
“No. If you clear the ball and the opponent is in the middle of it… I feel sorry for the opponent!
“Whoever is on the pitch has to do it. It's a final. A final is about winning. You can't wait for the opponent to be better than you, or let them start to play their football.
“We are going to start aggressively. A final is about this. Everyone wants to win the trophy."