So what makes the little man tick? When the Spanish director Alex de la Iglesia was asked to make a documentary about Argentinian and Barcelona footballer Lionel Messi, he decided to look for what he calls the "rosebud" moment. If he searched hard enough, De la Iglesia was certain, he could discover just why Messi had pushed himself to become one of the greatest footballers of his age. When he was researching and making the film (which premiered at the Venice Festival earlier this month), De la Iglesia was thinking all the time about the boy with the sledge who grows up to become the all-powerful media magnate in Orson Welles' Citizen Kane.
De la Iglesia wasn't much interested in football. His films – The Day of the Beast, Perdita Durango – have tended to be outrageous comic-book fantasies full of sex, violence and very dark humour. Nonetheless, when the Messi project was proposed by Mediapro, he was intrigued. Part of the fascination was the air of mystery that surrounds Messi. The footballer doesn't give many interviews. Off the field, he is a guarded, shy and private figure, who, as the director says, "is always in a bubble".
"I said, "OK, yes,'" De la Iglesia recalls of his reaction when the project was proposed. "He (Messi) was so different to me."
De la Iglesia was also fascinated by the way that (in his view at least) Messi polarises opinion in spite of his astonishing ability. "Half of the world loves Messi. The other half hates Messi. There is not something in the middle."
In order to "explain" Messi, De la Iglesia decided to canvas the opinions of some of the footballers and coaches who've worked with the player. His screenwriter was Jorge Valdano, the outspoken former general manager of Real Madrid, recently in the news for his withering attacks on the egotism and petty-mindedness of current Chelsea manager José Mourinho (whom he likens to Salieri in Amadeus.)
The figures De la Iglesia invited to participate in a special dinner at which they would discuss the riddle of Messi included Dutch legend (and former Barcelona player and manager) Johan Cruyff and World Cup-winning Argentina manager, César Luis Menotti. Also present were some of Messi's current teammates, among them Andrés Iniesta and Gerard Piqué. Other participants include Argentine and Catalonian journalists, some of the player's old friends from school and kindergarten and even the doctor who looked after him when he was a kid. The one disappointment is that he wasn't able to reach Maradona (who asked for a $1m to appear in the film and therefore features only fleetingly in archive footage.)
The documentary gives us the illusion we are watching a single event. In fact, the film edits together two separate dinners at restaurants in Buenos Aires and Barcelona.
"It is beautiful to do it in this way," the director explains. "The second point is that it was good for the movie because the people are more relaxed when they are eating. They are drinking wine… the cameras were really far from the table