5 of the most heated player/manager feuds in football history 

#2 Sir Alex Ferguson vs David Beckham

Ferguson famously threw a boot at David Beckham

Sir Alex Ferguson's feud with David Beckham is said to have been the main reason for the English midfielder's move to Real Madrid back in 2003.

Ferguson was said to have been unhappy with Beckham's general attitude, and the two men famously came to blows in the changing rooms, with Ferguson famously kicking a boot at Beckham's head, cutting him above the eye and grabbing headlines all over England.

The two men have since reconciled, with Beckham himself acknowledging that he was young at the time and was likely acting against his better judgment.