Real Madrid chief Emilio Butragueno says they won't underestimate their Champions League group opponents.
Real have been drawn with Napoli, Union Berlin and Braga.
Butragueno said: "It's a tough group. We know what this competition is like. Every match is a challenge and we'll have to play at a high level to go through.
"Napoli had a magnificent season last year. They have very dangerous players and will be very tough opponents. And both Braga and Union Berlin, who we have never played against, are also two very competitive teams and it won't be easy.
"Real Madrid always compete very well. We've had setbacks with injuries but those involved have that winning mentality which allows us to overcome obstacles and adversity. We are very proud of our players. Putting on that shirt means a lot.
We play this competition with a very unique enthusiasm. Our stadium has an atmosphere for these matches which helps our players to forge unforgettable and magical nights."
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