Quote: Sacred Cow "Incorrect. There is nowhere in the rules where an accidental head clash is even a penalty, let alone a card.'"
Contact with the Head in a tackle. It's not actually an accident if it's an upright tackle.
An accident is when two players come together when neither expected the collision.
Yaya hit the tackle aggressively and it looked like a great tackle to me, but if he makes contact with the head it's careless and a bin.