Cambridge earned an FA Cup fourth-round replay at Old Trafford after Louis van Gaal and his Manchester United side persevered through an uncomfortable Friday evening at the Abbey Stadium.

Cambridge, the least positioned group staying in the opposition, were remunerated for their try with a return in Manchester that will give a huge support to their funds.

Van Gaal chose four at the back and endured a nighttime loaded with tension in the 0-0 draw.

On occasion it was hard to tell which side had won the opposition a record 11 times as the Us, who twice won at Wembley last season, declined to be cowed by their more distinguished rivals.

Richard Money's men had Van Gaal squirming on his back on the solid seat in the meeting hole, especially when pressing the six-yard box at corners.

Cambridge were deservedly level at halftime and obligated to Chris Dunn for staying so entering the last 30 minutes when the goalkeeper spared Radamel Falcao's shot.

It took United until the 64th moment to score at Yeovil in the third round and, regardless of involving Cambridge domain for most of the second half, they couldn't discover an opening.

Dunn spared from substitute Robin van Persie and Angel di Maria in stoppage time as the hosts praised a huge result.

Cambridge drew with United 1-1 in their past gathering at Abbey Stadium - as a component of a 4-1 total League Cup misfortune in 1991 - and hung on by and by.

United are still in with a shot of a first FA Cup win following 2004, yet must improve in the return.

Wayne Rooney and Juan Mata were excluded in the guests' match day squad, yet Van Gaal declined to take Cambridge daintily.

David de Gea began in objective, British record marking Di Maria in midfield and costly loanee Falcao in advance against a Cambridge side for whom Luke Chadwick, once of Old Trafford, was on the seat.

At the same time Michael Carrick was the main United player to demonstrate any self-control in a first half in which Cambridge, 75 spots beneath their rivals in the group pyramid, more than stood their ground.

Marouane Fellaini was busy for a foul on Sulley Kaikai, whose pace additionally vexed Antonio Valencia and Phil Jones.

The Us sent seven of their players into the six-yard box at corners, which implied, alongside their markers, De Gea had 14 players to arrange.

From one such set-piece the ball pinballed around, yet Josh Coulson couldn't hold his header down as it completed on the top of the net.

An alternate on edge minute came when Jones talented Ryan Donaldson the ball, just for the Cambridge winger to overhit it as he attempted to play it out of his feet.

United were abused when Adnan Januzaj was overturned by Michael Nelson on the edge of the has' case, yet no free kick was given by arbitrator Chris Foy.

The guests' precision was woeful, with Di Maria shooting out of the ground and discovering the target just with a powerless shot, which Dunn held.

Dunn needed to correct to spare a Di Maria exertion that redirected off Liam Hughes, with the pace taken off the ball.

Januzaj additionally hit an agreeable exertion at Dunn; generally United neglected to test the goalkeeper, with Di Maria striking a free kick from a guaranteeing position.

United continued with more prominent reason and pegged Cambridge back in their own particular half.

Dunn spared a shot directly at him from Januzaj and made a fine stop to deny Falcao after Carrick had strung the ball through to the Colombia striker.

United sent for the mounted force with 23 minutes staying, with Van Persie supplanting the incapable James Wilson and Ander Herrera on for Fellaini.

Focus back Jones, who oddly and inadequately took the set-pieces all through, shot off-focus from open play and Van Persie was not able to keep a shot on the turn down.

Chadwick went ahead with 14 minutes go to a chorale of "Chadwick 1 Gerrard 0" - a reference to the previous United man's Premier League champs' award.

The Us were trimmed profound inside their own particular half and playing on the break, yet United's unsteady resistance seemed powerless.

Jones went to Chadwick, permitting Donaldson to break, however Januzaj's test permitted the guests to recuperate.

United had risks as the amusement entered stoppage time, yet Dunn denied Van Persie and Di Maria to gain a style replay.