Something potentially big happened on the fringes of the World Cup this week. European Football Clubs, the (unhelpfully) renamed entity previously called the European Club Association, agreed to set up a joint venture with Fifa to run the Club World Cup. EFC has a similar arrangement in place with Uefa to market media rights for the three pan-European club competitions, a partnership that has already yielded significant increases in TV revenue. The deal is likely to accelerate plans to expand the tournament from 32 teams to 48, perhaps as soon as 2029. Europe already sent 12 teams to last year’s Club World Cup, but with a cap of two teams per country. Assuming the increase is split on a pro-rata basis, Europeans would take up 18 spots in a bigger competition, and the per-country cap will surely be raised. Last year’s CWC suffered from not having several of the biggest clubs in the world involved — Barcelona, AC Milan, Manchester United and Liverpool. Raising the number of Europe...