Keith Hackett's answers
1) The quality of the shirt underneath is irrelevant: the law about taking off shirts during goal celebrations is precisely worded and designed to prevent crowd incitement. So book him in the usual way.
Thanks to Hugh Allen.
2) It's a red card, and a penalty. Although the ball was in play outside the area, the offence occurred inside it.
Thanks to Nicole Jennings for the question.
3) The defender has misread the situation. He thinks that, by scoring a meaningless own goal, he has saved his goalkeeper from picking up a suspension for denying an obvious goalscoring opportunity. But the striker's shot seemed to be running wide – so there was no "dogso" offence to punish. There is also no such thing in law as "the last man" – it's a misleading phrase used by pundits who should be referring to "dogso" instead. If the defender hadn't intervened it would have been a penalty, but as it is, it's a goal. You should also discipline the goalkeeper with a yellow card for his reckless action in dragging the striker down.
Neil Patel wins the shirt.