James Rodriguez has urged fans to get behind Real Madrid captain Iker Casillas.
Casillas was jeered on Saturday against Valencia.
Ahead of their Champions League semifinal with Juventus, James said: "He's our captain, someone who has won a lot here and who deserves respect.
"When you're on the pitch, you're focused on the game and you don't hear whistles. I saw it afterwards and when you whistle someone, I think you whistle the whole team."