Rodrigo moved to Leeds last summer from Valencia.
On Bielsa, the striker told AS: "I confess that I was very curious and most people ask me more about him than about the club. He is an absolute character in the world of football, in a good sense of the word. Wherever you go, you say his name and everyone knows him.
"In my case, he treated me very well from the beginning. He has a peculiar way of understanding football and a very different way, very, very different, at least to everything I have had in my career. His personality is very different. It is quite an experience to be able to work with him.
"His working methodology has nothing to do with what I have encountered with other coaches. It is a more analytical way of working.
"And then there is the personality, which is what it is, very strong, but always with respect. What you see at a press conference is him, he never says anything in front of the media. The requirement is maximum. The relationship with the player is purely professional."