Brazilian fans, once skeptical, are now roaring with belief. After Flamengo's group win, supporters in Philadelphia sang chants warning Bayern Munich of what's to come.

Among the stars competing in the FIFA Club World Cup are Lionel Messi, Harry Kane, Ousmane Dembélé, Weston McKennie and Denzel Dumfries, all of whom are expected to star for their countries at the 2026 World Cup.

Atlético Madrid head into their final Club World Cup Group B matchup on Monday; it's win or go home for the Spanish giants.