Real's players are still recovering from this week's rowdy title celebrations, but Sneijder insisted they will put on a show against their bitter rivals.
"Let no-one have doubts - this game is very important for all the players of Madrid. We know that we are Liga champions, but also our fans are going to fill the Bernabeu to see us win against our greatest rival and for that reason we are going to fight.
"I have played many classics in Holland and as in Spain they begin with no-one wanting to lose. The players of Madrid are determined to give it everything."