Not to be a dick, but I don't. They don't really look to get behind full-backs that often and they don't take potshots from far - which you'd think is the main source of corners.
On the Sanchez booking, I think he's definitely a diver, but I don't think that was a yellow. Actually think it was a pen. Clumsy running into the back of the player IMO. Not vicious but technically an infringement in the area.