Sir Alex Ferguson was on stage with presenter, actor and lifelong Manchester United fan James Nesbitt at the Theatre Royal in Drury Lane discussing his illustrious career as the manager of Manchester United.
During the £40-per-head event, the 72-year-old hit back at critics who claimed he left David Moyes with an 'ageing' side, suggesting the main reason he didn't success was because he didn't retain the services of Mike Phelan.
''It is an insult to say that I left an ageing squad,'' said Ferguson, reported BT Sport. ''Chelsea have seven players over 30 but nobody talks about them being an old team.
''It is easy to defend myself against all of that because all the statistics are there. I think he should have kept Mike Phelan, he was a United man; loyal, hard-working and a good judge of the players.
''I was always supportive of David, whenever he called I gave him the advice I would have wanted when I was manager.
''But David will do well in the future: life doesn't end when you leave United.''
David Moyes was constantly hammered during his reign at United for not retaining the backroom staff in place, and Alex Ferguson made his feelings clear on that at the time.
Mike Phelan and Eric Steele were among the key backroom departures when Moyes entered Old Trafford, and the general consensus is that they weren't replaced adequately.
Phelan, who has been both a player and coach at Old Trafford during his career, still remains without a club, while Steele returned to his former club Derby County.
On Louis van Gaal, however, the former Manchester United manager gave a rousing speech to why he was the right man for his old job.
''He has that philosophy, stubbornness and determination to succeed,'' expressed Ferguson. ''I've got every faith he will be a success.
''I have absolute faith that he's the right man for the job. It's been one step forward and two steps backward for them so far this season, in terms of injuries.
''Once he can get people fit and a settled, regular back-four, then that's the first route to progress.''
Ferguson and Van Gaal have been said to have a similar approach towards the team at Old Trafford and supporters will be hoping they will return to former glories under the Dutchman.
A lot has been made of Moyes' time at Manchester United and the decision not to retain the backroom staff will have no doubt played a part in that.
Nevertheless, Moyes simply didn't carry the same weight of a Sir Alex Ferguson or Louis van Gaal and would have needed to be an instant success to get the players on board to his ideas, and it just never happened.
Moyes, regardless of where he ends up, will be able to draw on his experiences at Manchester United just as much as his time at Everton, and hopefully become a better manager for it.