There is an inter-club rivalry that has dominated the build-up to the World Cup final. Qatar's showpiece is being headlined by the two biggest stars of its club vehicle, Paris Saint-Germain, and it's hard to divert the build-up to today's game away from the head-to-head between Lionel Messi and Kylian Mbappe.
But since 1990, the first World Cup final to feature teammates on different sides, it has become a regular occurrence, and including PSG there are five clubs with a foot in the France and Argentina camp. For the first time, Manchester United fans will watch a World Cup final with split loyalties.
Tottenham, Atletico Madrid and Juventus also have representatives on both sides of the divide and as the game becomes more global, the rivalries on the biggest stage are likely to become more colloquial. At each of those five clubs at least one player will return a victor and one a loser from the biggest game on the planet. There could be some awkward exchanges at training grounds over Christmas.