Allegedly just a year into his tenure the Portuguese began to believe that there were people conspiring against him.
Leaked team news before a vital Clasico match in April 2011 added to his neurosis and at the end of the match he accused his players of being traitors and called them "sons of b*****s".
"You're traitors. I asked you not to speak with anyone about the team selection but you've betrayed me," Mourinho is quoted as saying in The Special One: The Dark Side Of Jose Mourinho by Diego Torres, translated by Pete Jenson.
"It shows you're not on my side. You're sons of bitches. The only friend I have in this dressing room is Granero... and I'm not even sure that can trust him any more.
"You've left me all on my own. You're the most treacherous squad I've had in my life. Nothing more than sons of b*****s."