#4 Luka Modric (£27m from Tottenham)

Modric came to Real Madrid in what was thought to be the prime of his career. Joining just before his 27th birthday, the Croatian midfielder had developed a great deal at Tottenham and wanted to try his luck at the Bernabeu.
What only very few could have expected, is that he would take another leap at the Galacticos and turn into the player we are seeing today. Despite Madrid's recent struggles, Modric and Kroos have formed one of the best midfields in Europe over the past few years.
Modric's ability to protect and distribute the ball in the opposition's half is fantastic and he's truly taken a step forward to become a superstar at Los Blancos.
Although his time under Mourinho was short-lived, the Portuguese found his successors a fantastic player who has become indispensable at the club. The fact that he's been a key member of the team that has won three out of the last four Champions Leagues speaks for itself.