Sir Alex Ferguson made the unusual step last summer of confirming his interest in a player only to miss out on them, for the Scotsman usually keeps quiet on transfer targets unless they are near-guaranteed to arrive.
Perhaps it was a miscalculation on his part while off on a pre-season tour, perhaps he did not see PSG stealing in and outbidding the Red Devils.
That is exactly what happened, as the French club offered £35 million for the Brazilian and even allowed him to remain in his homeland until January.
Since arriving at PSG in 2013, Moura has lived up to his star billing, with four assists in his first 11 games for the club.
He has also featured in a Champions League clash with Barcelona, a pulsating if controversial 2-2 draw, and is preparing to try to cause an upset at the Nou Camp in the second leg in midweek.
With United already knocked out of the competition, Moura is clearly savouring the experience and not having any regrets, and has been praising the standard of the French league.
He told L'Equipe: "In France, football is the fastest and the highest rate. There is no downtime. But I like to play this way I think it matches perfectly to my style."
It appears as though Moura really is loving life in France, and that's despite having already encountered Ligue One's latest badboy, Joey Barton, who has been busy engaging in a war of words against PSG in recent weeks.
Moura does appear to be the perfect fit for PSG, offering them an x-factor and unpredictability which Barcelona could find tricky to tackle tomorrow night.
It is not to say he would not have done so at United; with Antonio Valencia, Nani and Ashley Young combining to have terrible seasons, his presence certainly would have benefited the team, but there is a different kind of pressure at United as several players have found to their cost in the past.
With the league title secured, and Wilfried Zaha incoming, and United financially better off, it could well be that everybody is a winner from this particular deal.
Did Moura make the right choice for him? Can he help PSG beat Barcelona?
image: © Doha Stadium Plus