Penalties

I think the referees rule that when a player turns his back he is open to being penalised. When he turns his back and extends his arm and the ball hits it, it's a penalty. Now, not all referees apply this rule but I've seen plenty do it. Also, there isn't a defender out there who know that if he stands up and faces a shot and it hits his hand, it's a judgement call that will go your way a lot. If you turn your back blocking a shot, the chances are a penalty will be given.

Tbh, I'd like them to just clarify natural position of the arms in the laws. Basically situations where you turn you're back are not natural positions. Situations where a defender slides on the ground and the ball hits a flailing arm, that is not a natural position. Defenders running out and doing a star jump block (John Terrys classic block style) is not natural. Defenders handling a ball around head height when jumping to clear a cross is not a natural position. There are more scenarios but all of the above should result in penalties all of the time. The problem is the consistency. That penalty would be awarded by lots of referees tonight. The problem is that it wouldn't be awarded by all. 

Tbh, I'm surprised at the almost unanimous verdict that it wasn't a penalty against Kimpembe. I thought it was stonewall. I thought there a far far worse decision by VAR not to give Roma a penalty at the end of extra time that would have sent them through.