However, the three-time Ballon d’Or winner revealed it was intense when Ferguson lost his temper inside the Old Trafford dressing room.
Ronaldo has explained what tended to happen when Fergie flew into a rage - and revealed that the Scot, on at least one occasion, said ‘F*** you’ to him for failing pass the ball.
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"I remember sometimes when we do something bad or we lost some games he kicked the chairs and he kicked the boots, he kicked everything, the waters, the drinks," Ronaldo is quoted as saying by FourFourTwo.
"And he’s so red and, ‘F*** you, you should pass the ball, you…' it was unbelievable but it was good - because we learn."
Ferguson and Ronaldo have excellent relationship
Ferguson’s style of management rubbed a handful of Manchester United stars up the wrong way, but very few of the players who worked under the iconic British coach have anything negative to say about his overall ability as a manager.
The Scot’s remarkable record speaks for itself - Ferguson is unquestionably one of football’s greatest ever managers.
Ronaldo had an excellent relationship with Ferguson and left Old Trafford on good terms after agreeing to spend one final season at Manchester United before joining Real Madrid in the summer of 2009.
The two men still have a great mutual respect, with Ferguson recently naming Ronaldo as one of only four truly “world-class” players he managed during his 26-year career at Manchester United, alongside Eric Cantona, Ryan Giggs and Paul Scholes.
Ronaldo needed a father figure like Ferguson at United to complete his transformation from the confident but raw teenager who arrived at Old Trafford in 2003, to the goal machine who left six years later.
It was a match made in heaven - and Manchester United benefitted.
Manchester United fans: would you take Cristiano Ronaldo back to Old Trafford next summer? Have your say by leaving a comment in the box below!