Rodney Marsh is well known for his outspoken views on the game. And he has wasted little time getting stuck into the Red Devils' newest recruit before he has even kicked a ball in anger in the Premier League.
Confidence clearly won't be an issue for the man who made a name for himself at the Brazil World Cup last summer.
"I believe I can be one of the best players in the world," he is reported to have said by the Daily Mail on arriving in England this week.
But former Manchester City player Marsh was quick to fire off a warning to Depay on social networking website Twitter.
In a series of tweets Marsh said the young star should not get too carried away.
He said: "Depay says he can reach the same level as CR7 (Ronaldo) at Manchester United? Tip: play a game first son.
"I remember another young United winger with loads of confidence - his name was Januzaj."
On reading Depay's confident quotes, Marsh said he must first become the best player in Manchester before thinking about conquering the world.
>Oh no, first step become best player in Manchester .... https://t.co/VSTROilFpG— Rodney Marsh (@RodneyMarsh10) May 13, 2015
With nine England caps and 218 goals in 505 career matches for the likes of Queens Park Rangers, Fulham and City, Marsh, who played alongside one of United's best ever players George Best, speaks from a position of authority.
Like Depay, he too was a player blessed with sublime skill and knows all about the pitfalls of over-confidence.
Depay's comments were that of a confident young man looking to impress his new fans. But only time will tell if his actions on the pitch back up the hype off it.