Roy Keane has reignited his row with Alex Ferguson, stating that the former Manchester United manager has a "massive ego".

The Ireland assistant boss who was speaking as part of ITV4 documentary Keane and Vieira: The Best of Enemies.

He accused the current club director of trying to "control" Man United even after retirement.

"Everything is about control and power. He's still striving for it now even though he's not manager. There's massive ego involved in that," said Keane.

The Corkman was severely criticized in Ferguson's recent autobiography.