Blues boss Maurizio Sarri is rightly frustrated by his employers' reluctance to invest in players over 30 - if you're good enough, you're old enough
Before selling Cristiano Ronaldo to Juventus, the biggest mistake Real Madrid president Florentino Perez had ever made in the transfer market was allowing Claude Makelele to join Chelsea.
In the summer of 2003, the French defensive midfielder was seeking a pay rise that still would have only seen him earn half as much as his compatriot, Zinedine Zidane.
In an embarrassing show of ignorance, Perez utterly dismissed the merits of a player who was integral to how Real were playing at the time and deemed Chelsea's offer of £16.