Now Darren Ferguson, manager of League One side Peterborough, has hinted it could be the summer of 2010 when his father finally walks away from the game.
Related ArticlesUnited tarnished by link with disgraced AIGChampions League guideUnited face loss of AIG £14mUnited will retain 'disgraced' logoManchester United manager Sir Alex Fergusons possible successorsPatrice Evra agrees new Man United deal"His health is fine and he's building a new team," said Darren. "If they win (the Premier League) this year then they catch Liverpool in terms of titles won.
"I can see him doing this year and next - and then that might be it for him."
Meanwhile, left-back Patrice Evra has played down United's back-to-back defeats against Liverpool and Fulham.
The France international told the Sun: "I've been here for three years and this is the first time I have lost two straight matches.
"I am sure it is just a little accident."