Aguero has been in scintillating form during the early part of the season and he gives Pellegrini a lot of the credit for the way he has worked since taking charge in the summer.
He explained: "As I've always said, every coach is different.
"They have different ideas on how to play the game and we must adapt to Pellegrini's style and do what he says.
"He demands a lot of me during matches and in training. He encourages me to be at my best at all times.
"When your coach is like that, he gives you confidence and the only way to repay his faith in me is to show my best on the pitch."
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