Some stories are too neat for fiction. In 2007, a 20-year-old Lionel Messi, already a rising star at Barcelona but not yet the player who would rewrite the record books, posed for a charity calendar cradling and bathing a chubby, contented baby. Neither he nor anyone else had reason to note the infant's name. It was Lamine Yamal.

Almost two decades on, that baby has grown into one of the most exciting footballers on the planet, and the two are about to meet again in the most improbable of settings: the World Cup final, Messi leading Argentina and Yamal starring for Spain, at MetLife Stadium in New Jersey on Sunday.

A raffle, a calendar and a coincidence

The photograph came about almost by chance. It was part of an annual charity drive run by the children's agency Unicef and the Barcelona sports paper Diario Sport, which held a raffle inviting families from the town of Mataró, north of Barcelona, to have their picture taken at Camp Nou with a player. Yamal's family, from the Rocafonda neighbourhood, won a place, and their baby son was photographed being gently washed in a basin by Messi.

The image lay largely forgotten for years. It resurfaced and went viral during the 2024 European Championship, as Yamal burst into the wider public consciousness, and the photographer who took it, Joan Monfort, later recalled the shoot, describing how a shy Messi had not quite known how to handle the baby. What had been a small act of charity became, in hindsight, an almost eerie foreshadowing.

Two eras, one pitch

The final frames a rare meeting of football's past and future. Messi, now 37 and widely thought to be at his last World Cup, has dragged Argentina through the tournament with flashes of the brilliance that has defined his career, including a decisive contribution in a tense semi-final win over England. For a player who has already won almost everything, a second successive world title would be a storybook farewell.

Yamal, by contrast, is at the beginning. A teenager blessed with balance, vision and nerve, he has become the emblem of a gifted Spanish side that arrives among the favourites. Where Messi is closing his story, Yamal is opening his, and the sight of the two on opposite sides carries an unmistakable sense of a baton, if not being passed, then at least being contested.

More than a gimmick

It would be easy to treat the tale as a novelty, a charming coincidence to fill the days before kick-off. But it also captures something true about the sport: how long careers can be, how tightly its community is woven, and how a fleeting encounter can acquire meaning only with time.

On Sunday there will be no basin and no calendar, only a world title at stake and a global audience watching. Messi and Yamal have shared a frame once before, in circumstances neither could have imagined. That they should share the biggest stage in football, as rivals, feels less like coincidence than like the game writing one of its better scripts.