Now after last term's League and Champions League double, Ronaldo says he can fulfil his ambitions at United.
He said: "Last season was the best moment of my career but I know I can get even better.
"I want to score more, win more trophies. I'm at the right club for that.
"Last season enabled me to achieve great things on many levels and I'm really happy.
"I'm lucky as I have a great relationship with everyone at United."