Atletico Madrid hero Diego Forlan believes Real Madrid will be making a massive error if they allow Sergio Ramos to leave.
The Real captain is off contract in June and in dispute with management over talks regarding a new deal.
Forlan told El Larguero: "It would be a shame (if Sergio Ramos did not renew his contract with Real Madrid) and that a player with his career had to go elsewhere and end up elsewhere.
"He is fit and makes a difference. Defensively he is strong and has his presence. No club is based on one player because it depends on everyone."
He added: "The mistake that Barcelona made with Luis Suárez is being made by Real Madrid with Ramos. They are important, there is a squad, there are negotiations and one has to understand it on both sides. He is a great player and one who is more important than some young players."
