The hugely popular midfielder will be sorely missed and we await his next move with interest as everybody wishes Juan the very best of luck in his future career.
Of course, the Spaniard takes with him many special memories from his service in the red shirt and is clearly extremely proud to be able to call himself an adopted Mancunian.
"It has taken me some time to process the change that is happening in my life," wrote Mata. "This is a message that, for many moments over the last years, I never thought I would be writing but, of course, all good things come to an end and my time as a Manchester United player has just finished.