20 10 world cup: why does a team lose without wearing a regular season uniform?

No, I once supported Italy (they are blue), and they went home early; Later, I supported South Korea (they are blue), and I was angry all night to make Uruguay shut out the promotion right; I'm depressed. . . . Today, I support the Netherlands. Unexpectedly, Brazil is wearing blue again. As a result, they surprised our family (our family is a Brazilian fan) and were out, hahaha!