tazmania the rule for rescinding a a yellow card given to the wrong player can only be applied when a yellow card is given, yes.
I find it very funny when people cry rigged while getting mad at hypothetical scenarios that haven't actually happened.
@Sicario2 has already claimed that it's rigged for a Ronaldo Messi final, he's just changing the conditions as the matches goes by. Unwritten rule that you don't send a player off for diving? If anything, making a clear dive like that is unbelievably stupid and even more deserving of a yellow than if he didn't have one before. I could understand the outrage if it wasn't quite clear whether it was a dive or not, but it just looked ridiculous.