United’s French midfielder has been represented by the 53-year-old since making his debut with the Red Devils in 2011.
And Raiola has helped his client secure the second-biggest deal with the club at £290,000-a-week.
But former Italian player Antonio Casino, who has commented regularly on Pogba on Italian TV, has revealed how the agent approached negotiations with the club very nonchalantly.
Speaking to Bobo TV [via Il Bianconero] , the pundit said: “I know that when he still had to debut with Manchester United, Mino Raiola went to Ferguson asking him for a lot of money to get him to sign the contract.
“Ferguson asked the agent if he knew what kind of player Pogba was, and Raiola replied by saying no.
“He cared little, those were their requests and if they were not met they would go away. Without batting an eye, Ferguson ruled that Pogba could also go away.”
Pogba has enjoyed a mini revival at Old Trafford over the last seven games, appearing in every minute except for the 6-2 win over Leeds.
But it has not stopped the Frenchman being linked with a United exit as the club decide whether to trigger his one-year extension or take a fee from interest clubs.
Arsenal legend Ian Wright, though, has urged his former side to get involved in the potential battle as he would “love” the Gunners to sign Pogba.
But Ole Gunnar Solskjaer may decide against a sale, having secured a response from Pogba with a passionate plea.
Pogba is in his fifth season with United, having returned from a four-year spell at Juventus.