Real Madrid star Cristiano Ronaldo says the desire to improve is the secret of his success.

Ronaldo won his third Ballon d'Or on Monday.

"There's no secret: it's a matter of always being willing to learn. For me, each season is a new challenge and I face up to it as such. Each new campaign is different and you have to leave behind what's already happened. Obviously you need to focus on the present but you need to think about the future.

"I tell myself, I have years still to play but the better things are going now, the better the future will be. That's how I think, and I believe my strong point, in psychological terms, is always wanting to improve. Maybe that explains why I've been at a very high level for so long. Of course, work comes into it, as I always say, but it's also the desire to be the best."