You don't understand, Azpi is sure a better defender than both of them but against Norwich we didn't need defending fullbacks, we needed the attacking ones. Kenedy was chosen to give a new dimension to attack from the wing due to his pace and strength. Ivanovic is a great header of the ball, Mourinho understood that if we aren't able to break their team down we would surely ensure a goal from a set piece with Ivanovic, Terry, Zouma, Costa, Matic. So i fully back his team selection