Three wins in the last four games have given the team a real boost.
Mascarell said: "We're confident and the team morale is really high. That's the key to this team, we're a good group of players and we can get three points against any other team. The team have improved in terms of intensity and now we're playing very well.
"The Clásico always means extra motivation and I'm really glad that all three points have stayed in Madrid. The fans are supporting us really well."