Ronaldo’s former club, Real Madrid were thrashed 5-1 by their greatest rivals, Barcelona, in Sunday night’s El Clasico.
Ronaldo told France Football magazine, “I felt within the club, especially from the president, that I was no longer considered in the same way as I was at the beginning.
“For the first four or five years, I felt like Cristiano Ronaldo. Less so after.
“The president looked at me in a way that suggested I was no longer indispensable, if you know what I mean. That is what made me think about leaving.”
The Portugal captain left Real Madrid for Juventus in a 100 million-euro ($115 million) deal in the summer.
