#3 Fix the leaky defence:
Real Madrid conceded 4 goals against Atletico Madrid, a team that isn't known for scoring heavily every match. The whites never conceded these many goals against any team in a single match under Zidane. The key to winning a game is scoring goals but the key to winning a championship is a strong defence. Real Madrid will have to keep a check on the number of goals they concede due to silly defensive errors.
They need to buy a proper left back to replace Theo who has left on a loan to Real Sociedad. Vallejo is injury prone and needs to be properly managed. The biggest dilemma is to choose the number one choice goalkeeper between Courtois and Navas. Both of them have been amazing in the recent past so it is going to be a hard choice for the manager.