The Wales international has netted 21 times for Los Blancos this term, but said that he is planning to emulate the Portugal superstar by adding more goals to his game.
He told the Daily Mail: "I've learned a bit of everything from him. The way he plays and gets himself into certain positions; it's a chance to learn off one of the best players in the world. Hopefully that will improve me as a player.
"I don't think there's anything specific, it's more my all-round game, positioning-wise. I need to get myself into more goal-scoring positions.
"Every year I try to keep improving and I tell myself that if I keep working hard I will get better."
Carlo Ancelotti's side will meet fierce local rivals and newly-crowned La Liga champions Atletico Madrid in the Champions League final on Saturday.