Ten worst Chelsea transfer gaffs, including £50m flop Fernando Torres & Daniel Sturridge sale to Liverpool

6) Juan Mata

An inspired signing by Chelsea from Valencia, but a rash sale by the club in this year’s January transfer window, there can be no doubt that the Juan Mata situation was handled badly by Jose Mourinho. The Spanish playmaker was far and away the club’s best player in his first two seasons at Stamford Bridge, and was inexplicably dropped from the team upon Mourinho’s arrival, which led to a big-money move to one of their biggest rivals Manchester United.