In the Champions League, Real Madrid, in addition to luck, also has the support of the referee, because this team often plays as champions, so in some controversial issues they get an advantage, even as it was in the cancelled penalty of Alvarez, in my opinion it is stupid to cancel such a penalty... So in order to beat Real Madrid, you need to be not only stronger than them. You also need to take into account other circumstances that can affect the result and in the case of Real Madrid, it is not only luck.