4.- Diego Costa – Chelsea FC
The Spanish/Brazilian forward came to Chelsea as one of the most high profile players in recent memory, he even made an impact playing for the club during his first season.
With the Blues, Costa won the Premier League under Antonio Conte but something changed during that summer.
The player refused to play for the Italian manager again, then he decided to return to Atletico Madrid under his terms.
The Chelsea fans can’t stand the sight of him still, they consider him highly unprofessional.