Greenwood, however, admits he's never met the former club captain.
He said, “Wayne Rooney and the Brazilian Ronaldo have always stood out for me. I've always looked up to them.
“Rooney is such a great goalscorer, that is what I want to be.
“He's done most things on a football pitch and you have to have a role model.
“I've never seen him! I've seen his games obviously and watched the highlights on YouTube. Hopefully I'll get to meet him one day.
“Ronaldo was quite a while ago — but my dad used to show me clips of him. He used to play for all those great teams."