Forget Adnan Januzaj, the best young player to walk through United's academy in recent years is Ravel Morrison.
Not our words, but those of defender Rio Ferdinand, who claimed last month Morrison had more talent than anyone he had seen, including Paul Pogba.
Now Rio can merely watch on at his old club, as Morrison begins to fulfil his potential and carve up opposition defences - helping West Ham destroy Tottenham at the weekend.
Morrison was described by journalist Henry Winter as the most naturally talented player to emerge from United's academy since Paul Scholes, but concerns over his application and frustration with his attitude led to Sir Alex Ferguson selling him in 2012.
West Ham were the lucky beneficiaries as their supporters know only too well.
Famous fan and comedian Russell Brand sought to rub the pain United fans may be feeling at watching their former starlet fulfill his potential at the Hammers, ahead of his tour date in Manchester tonight.
Just arrived in Manchester. Tonight I will give you a show of deep gratitude in return for Ravel Morrison. #MessiahComplex— Russell Brand (@rustyrockets) October 9, 2013
Morrison is clearly loving his football at West Ham at present, and West Ham fans are also evidently embracing his good form.
You can hardly blame them for enjoying stealing a march on a club like United. The Hammers' best recent generation of talent, Rio Ferdinand, Joe Cole, and Frank Lampard, all moved on to fulfill their potential elsewhere.
They'll be wise to know Morrison may not be there forever, but they will certainly enjoy him while they can.
image: © Tom Cuppens