The first leg of the semi final takes place at the Bernabeu on Wednesday in a tie which could decide the winner of the tournament as either sides look set to be favourites in the Champions League final against Schalke or Manchester United.
Busquets said: “Real Madrid is the worst opponent we could play now. We know that and have had tight matches with them.
“We must play our football and implement our philosophy. We have to play like the second period in the Mestalla, where we deserved more.”
