Footballers, most of them known for fancy hairstyles and being overpaid primadonas, are known for never looking hurt after every little thing.
Tough cookies, them.
No mate, we haven't played the game at a high enough level to be able to tell when a player is injured from just facial expressions alone.
Oh wait, his injury isn't that bad? Oh my days! Perhaps there is a flaw in the facial expression analysis?