Cambridge United 0-0 Manchester United

• League Two side earn lucrative Old Trafford replay

• Cambridge 76 league places below Man Utd

• Cambridge starting XI cost nothing, Man Utd's £180m

• Everything was against us - Van Gaal

League Two side Cambridge United defied the odds to hold Manchester United and earn a richly deserved FA Cup fourth-round replay.

The Abbey Stadium delivered a thunderous roar as referee Chris Foy sounded his final whistle to confirm Cambridge - lying 12th in their division and 76 places below their Premier League opponents in the football pyramid - had secured a money-spinning replay at Old Trafford.

And even though United had the better chances, with Cambridge keeper Chris Dunn saving brilliantly from Radamel Falcao and Angel Di Maria and substitute Robin van Persie off target - no-one could begrudge them a second crack at Louis van Gaal's side.

Cambridge have almost been rebuilt as a club, returning to the Football League this season after a nine-year absence, and this performance was testimony to all that work as they more than matched the Red Devils until tired legs inevitably took their toll late on.

And now that process will continue in "The Theatre Of Dreams" as they survived the meeting with a visiting side lacking the spark of captain Wayne Rooney, and failing to create any serious openings until the second half.

Van Gaal, whose side battled thought a third-round meeting with Yeovil Town, will have been bitterly disappointed with his team's lacklustre display - even though they are still overwhelming favourites to reach the fifth round.

United, who rested Rooney and Juan Mata, lacked creativity during a laboured first 45 minutes in which they were more than matched by Richard Money's underdogs.

Money made no secret of his plan to unsettle the Premier League side, with seven players crammed into the six-yard area in an attempt to make life difficult for goalkeeper David de Gea with sheer weight of numbers.

And with Phil Jones a symbol of that uncertainty, the obvious ploy almost worked on the half-hour.

Manchester United failed to clear a corner and the ball was smuggled off the line before a header from Cambridge defender Josh Coulson landed on the roof of the net.

Falcao's struggle for goals has been the focus of much attention but it was hard not to sympathise with the Colombian as he struggled in the face of poor service, which even when it did arrive was nearly always too pedestrian.

He finally got his chance just after the hour, when Michael Carrick delivered a forward pass of quality. Falcao applied a powerful finish but drew an equally strong one-handed save from Dunn.

Van Gaal had seen enough and made changes, sending on Van Persie and Ander Herrera for James Wilson and the ineffective Marouane Fellaini.

And Van Persie almost answered the call right away when he ran on to Di Maria's astute pass on the angle but directed his first-time effort over the top.

Cambridge had given so much that it was inevitable fatigue would play a part in the closing minutes - and so it proved - but goalkeeper Dunn was once more the hero, punching clear crucially before recovering to block Di Maria's goalbound effort, surrounded by players in the area,

It was the final moment of concern - leaving Cambridge's fans to celebrate wildly and savour the prospect of a trip to Old Trafford.

Cambridge boss Richard Money:

"We've said in the dressing room you're going to Old Trafford. Who cares what happens? Just go and enjoy it, soak it in. Whatever happens, happens.

"(It is) difficult to put into words just how proud we are. When you get back in the dressing room and recover, you just suddenly start to think about what it means to so many people.

"This club has been in the doldrums for 10 years, out of the Football League, and suddenly here we are taking everybody back to Old Trafford. It's incredible."

Manchester United manager Louis van Gaal reverted to a back four against Cambridge United

Cambridge United's players looked to exploit their height advantage against the visitors

Cambridge United's fans created a partisan atmosphere at the Abbey Stadium

The hosts went close in the first half when Josh Coulson headed over from a corner

Cambridge United have only kept five clean sheets in League Two this season