With several top European clubs looking to rebuild this summer, we have looked at the other great revolutions in football history.
From Johan Cruyff's Barcelona to Roman Abramovichh's Chelsea, these new eras all started with heavy investment.
Florentino Perez returned as president of Los Blancos in style, capturing the signings of Cristiano Ronaldo, Kaka, Xabi Alonso and Karim Benzema during an exciting summer window.
The likes of Arjen Robben and Wesley Sneijder made way for these new superstars as Real Madrid finished second behind Barcelona in LaLiga Santander, despite racking up 100 points.
However, there was a heavy defeat to lowly Alcorcon in the Copa del Rey and an early exit in the Champions League during an inconsistent campaign.
The good: Reuniting Real Madrid with the world. Exciting the fans again. Cristiano Ronaldo.
The bad: The 4-0 loss to Alcorcon and not getting further in Europe.
Johan Cruyff spent almost three million euros building his Dream Team as Barcelona strengthened in every department. They couldn't dethrone Real Madrid in LaLiga Santander, went out early in the Copa del Rey but saved their season by winning the Cup Winners' Cup.
The good: Planting the seeds of success with the likes of Ronald Koeman and Pep Guardiola.
The bad: Not reaching high expectations.
Backed by their super-rich owners, Manchester City really took off in their second season under Guardiola. They brought in Ederson, Kyle Walker, Benjamin Mendy in the summer, while Aymeric Laporte arrived during the January transfer window. They walked to the Premier League title and also lifted the Carabao Cup. A disappointing Champions League campaign ended in the quarter-finals with defeat to Liverpool.
The good: Racking up a Premier League record 100 points, scoring 106 goals and winning 18 consecutive games between August and January.
The bad: Going out to Liverpool in the Champions League, despite being heavy favourites to progress.
Businessman Jesus Gil's first adventure in Spanish football saw him pump hundreds of millions of pesetas into Atletico Madrid. They signed Paulo Futre from Porto but went through three coaches, eventually finishing third in LaLiga Santander.
The good: Beating Real Madrid 4-0 at the Santiago Bernabeu.
The bad: Instability, a lack of patient and constant problems.
Roman Abramovich started to see his investment bear fruit a year after taking over the Blues. Jose Mourinho won the Premier League in his first season in charge thanks in large part to the big-money signings of Didier Drogba, Petr Cech, Ricardo Carvalho and Arjen Robben. They also won the Carabao Cup but failed to get to the Champions League final after Liverpool's 'ghost goal' in the last four.
The good: Building a team of steel. Frank Lampard's stunning displays and the impact of Drogba.
The bad: Not getting further in the FA Cup.
Nasser Al-Khelaifi began his reign in 2011 and, ahead of the 2012/13 campaign, he spent a total of 151 million euros on Thiago Silva, Ezequiel Lavezzi and Zlatan Ibrahimovic. Carlo Ancelotti went on to win Ligue 1 but went out in the quarter-finals in the Champions League.
The good: Gave a warning to the rest of Europe. Ibrahimovic scored 35 goals.
The bad: Couldn't come back against Barcelona in the Champions League.
New Russian investors saw Monaco bring in the likes of James Rodriguez, Radamel Falcao and Joao Moutinho. They finished second in Ligue 1 under Claudio Ranieri and went out of the Coupe de France in the semi-finals.
The good: Worried PSG. James was ready for the World Cup.
The bad:Falcao's serious knee injury that would play a part in derailing the project.