FIFA has threatened to ban any player or club involved in breakaway competitions, amid renewed talk of a European Super League involving some of the world's biggest teams.
A breakaway continental tournament has been mooted and discussed for years, with Barcelona, Real Madrid, Atletico Madrid and many leading Premier League clubs believed to favour a ring-fenced European league which would include some of the richest and most famous teams.
However, this has been vocally rejected by others, with UEFA president Aleksander Ceferin and La Liga chief Javier Tebas among the most ardent critics of the breakaway plans.