6 controversies Sir Alex Ferguson had as Manchester United manager

#1 Clashes with numerous managers

The duo shared a rivalry like no other

Fergie was famed for his hairdryer approach to his players, but the 77-year-old was also no shrinking violet when it came to other managers.

The legendary manager had more than his fair share of clashes with other coaches, with Arsene Wenger, Kevin Keegan and Rafa Benitez among those to have been at loggerheads at one point or the other with Ferguson.

He welcomed Arsene Wenger with the rather disparaging remarks 'that he's a novice and should keep his opinions restricted to Japanese football as both men were engrossed in a battle to be the top dog in the Premier League, with their relationship reaching a head with the infamous 'Pizzagate' incident of 2004.

Though Wenger and Ferguson ended up having mutual respect for one another, it was not always so.

Perhaps the earliest high profile recipient of Ferguson's mind games was then manager of Newcastle Kevin Keegan who went on a now immortalized 'I will love it' rant on the radio before Newcastle fell by the wayside in their Title push.

Rafa Benitez also went head to head in a war of words with Ferguson, with the Spaniard unfurling a list of 'facts' which showed Ferguson's duplicity from a sheet of A4 paper which was read out on live television, while Ferguson replied that Benitez speaks a whole lot of bulls***.