Lionel Messi and Lamine Yamal meet for the first time on the football pitch in Sunday’s World Cup final, which serves as a reminder that the Argentina veteran and the Spain teenager share an extraordinary history dating back to 2007. Back then, rising Barcelona star Messi was pictured bathing and cradling an infant Yamal in a photo shoot organised by Barcelona and their shirt sponsors, children’s relief organisation Unicef, for a calendar. Yamal’s parents were invited via a raffle conducted by...