Speaking during a press briefing on Saturday, Flick emphasised the emotional and psychological recovery of the team following their continental disappointment.
"We spoke about what they (the players) are thinking, what they are feeling, it's important in a group that we speak about that," Flick said.
"Everyone knows that in a Clasico you have to be on your highest level, that's what we have to do. We want to be active, we want to see the team (play) with intensity on the pitch, dominant as normal, and we know it's a really fantastic team from Real (against us)."