from my point of view Madrid and Barcelona are the big problems of football in Europe for the last couple of years by getting a better team doesn't mean you must win every game both of them seen to be favorite by the refs whatever how much you love messi's talent or how you like cristiano's professionalism, they most of the time have gotten easy referring and we can say that .They never faced a hostile officiating. So If that was a penalty, then it was also a penalty for Cuadrado in the first leg.
Also if the same play happened on the other side and if that same fault were given to Juventus I don't think that the ref would given a penalty for Juventus to make the 4-0 comeback this trophy should given to Madrid or Barcelona from the beginning of the season without going for the trouble of playing it as you can see from the previous seasons that's is the reality of it.
Maybe it was penalty,and maybe it is not-but in such situation most of referees will be make same decision just because it was the easiest way in that moment for them.Imagine what would happen if this is not penalty kick,Real Madrid will turn football world upside down.This is become only money game,they invest money and they want something back in a sport way or in another way.Technology would help to make everything transparent in football,but have you ever heard that the big clubs want honest and fair game?
What they decide to do is change rules for next season so more clubs from wealthy leagues will get direct spots in
Champions League,and clubs from some small countries almost no longer will have the chance to play in the Champions League.From 26 clubs which will automatically qualify there will be at least 16 clubs from Spain, Germany, England and Italy.