Real Madrid players admit Champions League opponents Schalke are "not a famous team".
The clubs were drawn together for the final 16 yesterday.
"They are a team that are not as famous as some others, but it will be a tough game against a team who have deserved to qualify for this stage," said Sergio Ramos.
Iker Casillas also remarked: "Maybe they are not one of the favourites to win the Champions League, but we will have to play very professionally and respect the other team. We hope to go through to the next round."
