Mino Raiola is not a popular figure among the Manchester United faithful.
The super agent, who represents United star Paul Pogba, has been stirring the pot recently, fueling speculation that Pogba could return to Juventus this summer.
And after manager Ole Gunnar Solskjaer was quick to point out that Pogba is the club's property and not his agent's, Raiola blasted the manager on Twitter.
But as the war wages on between club and representative, some footage has re-emerged on social media, indicating that the bad blood between the two dates back to the tenure of Sir Alex Ferguson.
The legendary Scottish manager is filmed at a lecture, said to be in 2012, and is asked by an attendee why no-one could identify that Pogba would go on to become a '£100m player' before letting him initially join Juve.
And Ferguson's brutal assessment in response has gone viral once more.
" Paul Pogba? We all knew about Paul Pogba," Ferguson said.
"He just had a bad agent. A 's****bag."
Raiola has represented Pogba since he was a youth player at United, and it seems times haven't changed.
In a bizarre rant on Monday evening, the Dutch-Italian agent implied that Solskjaer was 'keeping Pogba prisoner'.
"Paul is not mine and for sure not Solskjaer's property. Paul is Paul Pogba's," Raiola said on Twitter.
"You cannot own a human being already for a long time in the UK or anywhere else. I hope Solskjaer does not want to suggest that Paul is his prisoner."
He went on: "I think Solskjaer may be frustrated for different reasons and is now mixing up some issues.
"I think that Solskjaer has other things to worry about. At least if I was him I would."
