Pepe said: "I know them well because I did the preseason with them. They are players who have quality. They have already demonstrated this with Getafe and Osasuna. The problem is that to play in Madrid is different. 80,000 people at the stadium and 80 million outside watching you.
"And if you don't do well, the murmurs and whistles can nail you in the soul. It is very different. This is something important they must recognise."