Jose Mourinho is one of football's biggest managerial characters - it is no secret.
The Portuguese has previously fired verbal abuse at numerous managers, including Arsene Wenger and Pep Guardiola, while having fell out with former Chelsea team doctor Eva Carneiro.
So it was only going to be a matter of time before the 53-year-old was the subject of some controversial news, while in the managerial hot seat at Old Trafford.
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However, the most recent revelation concerning the Portuguese is somewhat more light-hearted than his usual verbal attacks on opposition managers, and happened long before his move to Manchester - despite the claims having just been made.
According to a book by author Rob Beasley currently being serialised in theDaily Mail, Mourinho tried to sign Manchester United captain Wayne Rooney on two occasions, earlier in his career, while managing Real Madrid and then with Chelsea.
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However, his attempts to lure the Liverpool-born striker with him to Spain and London, respectively, were never successful. But sports journalist Rob Beasley has revealed that Mourinho let slip his nickname for Rooney, while in conversation with his son, Joshua.
In the lounge of the Mandarin Oriental Hotel in Washington DC, Mourinho approached Beasley's 12-year-old son, saying: "What do you think of us trying to sign the Fat Boy?"
According to Beasley, Mourinho's comments caused a moment of confusion, before the sports journalist responded: "He means Rooney — the Fat Boy is Rooney."
But despite Mourinho's light-hearted comments, the Portuguese was seriously hoping to tempt the United and England captain away from Old Trafford, prior to his arrival at the club this summer.
The former Chelsea boss had hoped Sir Alex Ferguson's departure in 2013 was enough to convince Rooney to leave Old Trafford for a fresh start in the south east of England. However, the Blues reportedly were awaiting a transfer request by the player, before submitting a bid.
Rooney wanted at Real
However, three years earlier, Rooney's career could have seen him head off to Spain, with Mourinho making it clear he would have took the opportunity to take the United striker to the Santiago Bernabeu.
Instead, both Mourinho and Rooney have united at Old Trafford, now hoping that the Portuguese can find the perfect role for 'fat boy' in a United squad that is forcing the former Everton striker further down field.
Can Wayne Rooney win back his place as a striker in Manchester United's team, under Jose Mourinho? Give your opinion in the comment box below.