As a Manchester City fan it would be easy for me to say...... it shouldn't have been ruled out...
Don't get me wrong, I think the linesman made a mistake because, in my view Sane was on-side, but here's what I don't get are we expecting the linesman to adjudge if the player is interfering with play? because I would suggest from a side angle he can't do that, ironically this type of situation would be pretty much the only time that additional official that stands next to the goal in European games might become useful.