Real Madrid captain Casillas: Aguero switch will be controversial

Real Madrid captain Iker Casillas knows Atletico Madrid star Sergio Aguero faces controversy should he move to the Santiago Bernabeu.

Aguero has made it clear he favours a switch to Real.

"I do not think it will be comfortable or easy to step into the capital of Spain and go from Atletico to Real Madrid."

"He is a very young player, decisive and very good."

"Right now he's one of the three or four players who are a little higher in the football scene. Everyone would love to have him in their squad."