Brown should have been sent off before half time in that game, before the first Celtic goal there was a foul on mcginn and there was also an off the ball incident where johannsen elbowed pawlett in the face. That's on top of the bizarre decision to award Celtic that corner.
In saying all of the above, Aberdeen and every club except Celtic realise that bad decisions go against them so Aberdeen should have defended that corner a lot better than they did or we could have written a letter..................