FIFA's billion-dollar gamble to revolutionize club soccer begins a week on Sunday with plenty of cash up for grabs but questionable enthusiasm as 32 teams prepare to contest the expanded Club World Cup in 12 stadiums across the United States.

The tournament — designed as a glittering showcase ahead of the 2026 World Cup — has had to contend with the prospect of empty seats along with controversial qualification rules and player welfare concerns after an exhausting European season.

Lionel Messi's Inter Miami face Egypt's Al Ahly in the opening fixture on June 15 at Miami's Hard Rock Stadium, with tickets still widely available days before kickoff.