Barcelona players believe Cristiano Ronaldo wants to leave Real Madrid.
Ronaldo, 30, was said to be furious after Real's crushing 4-0 defeat at home to Barcelona on Saturday.
"The atmosphere in the dressing room is not good," El Mundo Deportivo quotes a Barca player as saying, although they refuse to name him.
"(Ronaldo) is not happy. He is not comfortable with the team or at the club and he wants to leave."
The Barca player went into the Real Madrid dressing room after the game for a friendly chat and then relayed to reporters what he saw.
Manchester United, Shelsea and PSG are being linked with the Portuguese amid talk that he is planning to leave Real in 2016.