Fortunately for de Gea at White Hart Lane when he stopped an Aaron Lennon shot in the 13th minute and put it on a plate for Jermain Defoe, the lethal Tottenham finisher was denied when the Spanish youngster reacted quickly to deny the striker.
It might look an audacious move for a keeper who has never ventured away from Serie A but Fergie has never shied from a daring transfer swoop Robin van Persie being his latest bold capture.
Denying the original chance is a plus but giving the opposition a second bite of the cherry and undoing that good work has become his Achilles heel.
ConcernAs a 20 year old rookie in England, that failing was understandable when he first arrived wearing a hefty 20m price tag from Atletico Madrid.
Though the Dane will be 28 in April, he is still a rookie at United's level.
It left the Reds on a knife edge at Old Trafford after they were coasting at 2 0 Nike Air Max Black Infrared
That glitch has come on top of his glaring failure to be dominant in the air in the Premier League.
But the fact that de Gea is still being found wanting in the air is now a major concern.
And those same qualities rescued the Reds when de Gea stuck out a limb to divert Clint Dempsey's effort after he and Mousa Dembele had Nike Air Max 90 Leopard Print
Most recently against Liverpool, he parried a Steven Gerrard shot and Daniel Sturridge gratefully gobbled up the loose gift.
David De Gea's Jekyll and Hyde goalkeeping display at White Hart Lane looked like being a match winner for the Reds before his late, late aberration suddenly reignited the debate over his long term Air Max 90 Mesh Black
He has not been able to get himself out of the mire so eye catchingly on a number of occasions this campaign.
Sir Alex Ferguson's patience could now be wearing thin as de Gea's weakness is costing precious Premier League points. There is a growing belief that United are ready to give up on the Spaniard in the summer. De Gea is reported to be homesick as well and Barcelona are among those thought to be mulling over whether to take him back to La Liga.
There is also a question mark over current understudy Anders Lindegaard.
made a rare cutting move through United's impressive stubborn defence.
That tough ask is turning out to be as problematical and almost as farcical as was the task of replacing Peter Schmeichel way back in 1999.
The Reds could even make a clean sweep of their goal keeping department in the summer and start all over again as they seek Edwin Van der Sar's long term successor.
The 21 year old has a flaw to his impressive shot stopping armoury in that too often he parries efforts straight back into the danger area.
There was much to be admired in the Spaniard's display in a snow bound London. Impressive instinctive reaction saves with his legs saw him deny a deflected goal bound Gareth Bale shot.
It was highlighted again on Sunday when his weak punch under pressure dropped to Lennon who squared for Dempsey to snatch a draw with just 55 seconds of added time left.
ImpressiveBuffon is among the world's best, if not THE best. He will be 35 at the end of this month but van der Sar was 34 when Fergie snapped him up from Fulham in 2006 and he cajoled six hugely impressive years out of the Dutchman.
But the gremlins which have haunted de Gea since he joined United 18 months ago also resurfaced.
De Gea's gift of the gaffe costs Manchester United dear
And that followed on from a save against Swansea City before Christmas when de Nike Air Max 90 Essential Women's Shoe Gea stopped an effort from Jonathan de Guzman but Michu was on hand to poach an equaliser.
If United are searching for an experienced goalkeeper to nail down the number one slot then Juventus and Italy star Gianluigi Buffon would certainly be top of the list.
That could also rule out moves for Stoke City's Asmir Begovic, who is 25, and Sunderland's 24 year old Simon Mignolet.
The fact he's only had an FA Cup chance at West Ham since de Gea was sidelined in the first week in December through a wisdom tooth problem suggests the Dane has not convinced the Old Trafford hierarchy that he has the tools to end the goalkeeping travails.
United, inevitably, have been linked with a host of candidates.
But Butland is only 19 and Forster 24 and it is understood that United are beginning to shy away from recruiting youngsters for the key role having had their fingers burnt with de Gea.
England understudies such as Birmingham City's Jack Butland and Celtic's Fraser Forster have been touted.
Against Newcastle on Boxing Day, de Gea pushed out a Papiss Cisse shot only for James Perch to race in and snap up the rebound.
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