"I don't know if Mou will come back to Madrid, you never know"

The current Tottenham coach has celebrated his tenth birthday since becoming Real Madrid manager. Karanka went through 'Carrusel Deportivo' to review his time with Mourinho.

"He was very demanding and made us always very alert. Then he had that human side that people don't know about. After ten years he can say that we have an excellent relationship," he said.

Karanka gave his opinion on whether Mourinho will ever return to Real Madrid: "I don't know if Mourinho will return. Not too long ago there might have been a chance. In football you never know."

As far as how he found out Mourinho wanted him as his assistant, Karanka said he had not even spoken to the coach face to face yet.

"It was enough with the first conversation to make everything clear. Mijatovic speaks very highly of me because our relationship is fantastic and he helped me at the beginning as a player too."