5. Jose Mourinho vs Anders Frisk
When Chelsea met with Barcelona in the Champions League of 2005, Frisk was the referee that gave striker Didier Drogba his marching orders during the second leg, and Barca eventually went on to win the tie by two goals to one.
Not happy with the referee’s performance, Mourinho called Frisk out on it and set in motion a chain of events so severe that Frisk soon retired from the game thanks to death threats made against himself and his family.
Bit harsh, Jose…

