The game on Sunday will be the first ‘El Clasico’ for the Brazilian star who joined Real from AC Milan in a £59million switch in the summer.
Kaka told Cadena Cope: “We are thinking about Zurich, but everyone has told me how unique the Clasico is.
“Barcelona can play with their eyes closed. They know each other perfectly and play so well, but we are the leaders.
“I don’t think either side is the favourite on Sunday.
“Heading into the match as the top team is good because we can open a four-point lead by winning.”
