Is that a clear rule? Last I checked, any ball to hand contact is deemed as a PK now. Intention is not longer considered. It's black or white now (hit the hand or not).
So many notable European clubs lack patience with youth nowadays and they pay the price. Arsenal sold Adelaïde at a loss last season and he now joins Lyon for over £20m.
If you followed any of the preseason chatter, you'll get the reference. Anyway, an embarrassing home defeat to a less than seasoned Russian side. First time Porto won't be in the CL since 2011.