Jose Mourinho confirmed that Depay had joined Lyon today with a deal agreed last night.
The Holland international has struggled to live up to expectations since he joined Manchester United for £25million from PSV Eindhoven in 2015.
And under Mourinho the 22-year-old found opportunities hard to come by.
But the United boss paid credit to Depay for his professionalism throughout the past few months but conceded he couldn't fit him into his already overloaded squad.
Jose Mourinho said Manchester United are overloaded with wingers
Memphis Depay is Manchester United's third departure this window
— Memphis (@Memphis) January 20, 2017
"He was a fantastic professional, so if somebody thinks he didn’t work because he was not a great professional it is totally wrong," Mourinho said.
"One thing is some picture somebody takes of him in an amazing car or dressing in a very specific way but the image is totally wrong.
"The guy is a fantastic professional, he’s a kid that respected everyone, he tried to work, was frustrated because he was not having that but I only have good things to say about him.
Memphis Depay confirms Man United exit with messages to team-mates
Fri, January 20, 2017
Memphis Depay has confirmed his exit from Old Trafford with several goodbye tweets to Manchester United team-mates
1 of 7
Memphis Depay has confirmed his move from Manchester United to Lyon on Twitter
"If I can find a little reason it’s to say that he’s a player from the only position where we have over-booking.
"He is a winger and wingers is what we have more, so it’s the position where it’s more difficult to have chances, where it’s more difficult to be the next choice because it’s a position we never have problems, we have Lingard, Mkhitaryan, Mata, Ashley Young, Martial, Rashford, it’s a position where we have difficulties when we want to do rotation.
"So even during rotation when I tried to rest players, I had like seven guys for two positions, so for me I would say with these two things: he’s a fantastic professional and by another side we have too many players in his position."