#5 Review one-dimensional style of play
A fullback overlaps and sends a cross into the box - with Ronaldo usually on hand to tap in or score with his head.
Madrid's style of play has become rather stale and predictable this season - opposition managers simply know that they have to cut out the diagonal pass played by Modric or Kroos to an overlapping fullback. Even if Marcelo or Hakimi send a cross in, sides are set up to clear the ball in the box with ease.
Ironically enough, Zidane made some crucial tactical changes at momentous parts of his career, such as in the second half against Bayern Munich in the first leg last season. He knows what it takes, and it a bit surprising to see that a side that was comfortable switching between 4-3-3, 4-4-2 (midfield diamond) and a 3-4-3 last season could look so one-dimensional.
The best place to solve things in on the training pitch, and Zidane knows what he needs to do.