Prolific, cool-headed and unerringly consistent, Lionel Messi is one of the most revered footballers in history.

But did you know that his transfer to Barcelona was first agreed on a paper napkin?

Or that an x-ray of his hand was to thank for identifying his growth hormone deficiency?

And do you know why he refused to collect his first ever Champions League winner's medal?

Find out all this and more in Luca Caioli's classic portrait of a footballing icon, featuring exclusive interviews with those who know him best and even Messi himself.