Mourinho’s biggest and worst mistakes as Chelsea manager including Champions League loss and Shevchenko signing

8. Signing Asier del Horno

Cost the club £8m as they tried desperately to solve their left-back problem before Ashley Cole joined from Arsenal in 2006.

The most famous thing the Spaniard did whilst at the club was clatter into Lionel Messi and receive a red card in the Champions League defeat to Barcelona.