SunSport has got its hands on a special report exposing United's weaknesses during this year's FA Cup matches.
Our chums at E.ON and Powerzone compiled these stats and facts and leaked them to us last night.
REVEALS how The Sun-sponsored Crawley can exploit spaces left by attack-minded Fabio down the left.
UNCOVERS that rookie centre-half Chris Smalling and Wes Brown can be easily pulled out of position.
EXPOSES how Fergie's men prefer to attack down the left flank.
THE BIG PICTURE
Crawley must have a real go at United, sitting back will only invite pressure. But Steve Evans' heroes are not a normal non-league team. They keep the ball down, attack with pace and dominated Swindon, Derby and Torquay in the previous rounds.
HOW CAN YOU STOP THEIR ACE STRIKERS?
Javier Hernandez is small, quick and tries to get in behind defences. Crawley need two solid banks of four. By restricting space behind the back four that will prevent the strikers getting behind one-on-one with keeper Michel Kuipers.
Crawley cannot allow the likes of Michael Carrick or Paul Scholes to slice open the defence.
Southampton, in the last round, did this well. By restricting space, Hernandez and Michael Owen were forced to go searching for the ball, dropping deep and even wide when starved of service.
IS THERE A WAY TO SNUFF OUT MIDFIELD MAESTROS?
If Fergie opts for experience and plays Ryan Giggs and Scholes, Crawley are going to have their work cut out. They pulled the strings in the wins against Southampton and Liverpool in the previous round.
Giggs had a 90 per cent pass success rate while Scholes was slightly better with 93. And players like Carrick and Anderson are also good passers.
Crawley will have to let United dominate possession - because if they try to hunt down the midfield, United will pull them apart.
The golden rule is that our boys should only concede possession high up the field and remain solid in the centre of the park at all times.
By doing that, Crawley can avoid their centre-halves being pulled out of position and will have spare men available to charge down shots from distance.
United favour their left-hand side as a route forward, with nearly 40 per cent of their attacks coming from that side. John O'Shea is less likely to get forward than Fabio while, ahead of him, Darron Gibson is likely to try and cut inside where he can.
WHAT CAN YOU DO TO FIND DEFENSIVE CHINKS?
Keeper Anders Lindegaard is still a relative unknown and, with a 'weaker' United defence likely to include inexperienced players like Smalling and Fabio, perhaps there is no clear leader.
If Crawley manage to unsettle the back four, this could lead to a few anxious moments for United. Attacking down the right may expose a chink in United's armour.
The space vacated by Fabio will present an opportunity for Crawley's frontmen to pull Brown and Smalling out of position.
HOW CAN YOU CATCH THEM ON BREAK?
Maximise any holes left by Fabio's attacking forays. Crawley should also not get tempted to pump the ball long - that will be food and drink to United.
Analysis of the Southampton game showed Scholes, Anderson and Giggs did not track back as quickly as they should. Saints used this space well and set up a number of threatening counter-attacks.
This may happen again and, if Crawley get the chance, they should be prepared to attack with pace and not in isolation.
WHAT ABOUT SET-PIECES?
If Crawley do manage to push United wide it is reasonable to expect a high number of corners.
They should keep an eye on well-timed runs from four United players who line up at the edge of the 18-yard box. Don't set up with four defenders on the edge and ensure each player knows exactly who they are tracking.
LAST BUT NOT LEAST... HAVE NO FEAR!
Ride out the opening 15 minutes, quieted the crowd and dispel expectations of a drubbing. All of which will help breed confidence.
But I believe that Manchester United is flexible so whatever tactic have been reveal they still can beat crawly no matter what and make them crawl all over the pitch and Manchester United is playing at home and they are stronger. They having the 12th man in the pitch that will give them confident to the next level. What have been reveal it is the same old way how Manchester United play no matter how people know about it they still can beat the big MANU.
Just like Manchester City it try to mark all their dangerous player but at the end who win the game? It is Manchester United so it will not make a big different in the END! At the end of the day it is depend on luck and skill not about how good you know about the team even you know so well but can’t perform or cope with it will not be useful after all.
Let See What Happen TONIGHT!