We all saw what a head injury looks like on MOTD last night. Azpilicueta wasn't thrashing around clutching his face. Forget your 1% - it wouldn't be that many anyway - I would have been more specific and said 99.999% if I'd known you were gong to come in nit-picking! Besides, within weeks of...
Azpilicueta had a head injury today - everybody knew it and play stopped instantly, pretty much wthout the need for any action from the referee. Hint, then, for referees - if it's a head imjury, it's pretty obvious. If the player is clutching his face with his hands, rolling over and screaming...