Roy Keane and Sir Alex Ferguson led Manchester United to the treble in 1999 but the two haven’t seen eye-to-eye in a long time.
Keane unexpectedly left Manchester United in 2005 after an argument with Ferguson and making some comments against the club on MUTV.
The pair have had public disagreements since with Keane regularly criticising Ferguson’s management style.
And the former midfielder has spoken out against the Scottish legend again, believing Ferguson was more focused on his family than United.
“People talk about Ferguson’s man-management,” Keane told Off The Ball. “Don’t be kidded on by all of it.
“I was at the club when Bryan Robson left, when Steve Bruce left, two brilliant servants for Manchester United, and I didn’t like the way they were treated.
“His son Darren played for the club and won a league medal -[he was] very lucky.
“[Alex Ferguson’s] brother was the chief scout for Manchester United for a long time.
“I’m surprised his wife wasn’t involved in the staff somewhere.
“Darren was [the manager] at Preston North End and lost his job. He had a couple of young players on loan from Manchester United, [but] guess what happens the next day?
“They’re pulled out of Preston. Is that doing the best for Manchester United? Do me a favour.”
It comes after Ferguson did not hold back on Keane in his autobiography, which was released in 2013.
Ferguson had written: “He thought he was Peter Pan. No one is.
“The hardest part of Roy’s body is his tongue.
“What I noticed about him that day as I was arguing with him was that his eyes started to narrow, almost to wee black beads. It was frightening to watch. And I’m from Glasgow.”