The world of football is cyclical, it tends to revisit itself. And Real Madrid is a great example to remember this. 17 years after Florentino Pérez returned to the white presidency and signed Cristiano Ronaldo, Karim Benzema, Xabi Alonso and Ricardo Kaká in one go to dethrone Pep Guardiola's triumphant Barça, Leo Messi and company, the white leader, legitimized at the polls at the beginning of last June, is once again reaching for his wallet to challenge his eternal rival's reign.