Great feet from Robin van Persie as he pirouettes away from danger, like a Dutch Zidane, but he can't quite get a shot away from a tight angle. Almost at half-time.

He's coming! He's on his way!

@edwardssport:, external We have now been picked up by a local coach company and we're en route to Old Trafford. Hope the turnstiles are still open...

BBC Sport's Simon Stone at Old Trafford: "Marouane Fellaini has been a central figure in both goals, so perhaps there is enough evidence in that alone for Louis van Gaal to feel he got his tactics spot on.

"What we can never know, of course, is what would have happened if the hosts had been less direct and played at a quicker pace."

Oh dear. Jermain Defoe has a sight of goal for Sunderland but scuffs his effort horribly, a real pea-roller that barely reaches the goal.

Angel Di Maria with an arcing switch ball, 45 yards through the air and Wayne Rooney has time to wind up and launch into a spectacular volley - scuffs it wide. If he caught that flush we're talking goal of the season...

Former Cambridge forward Steve Claridge on 5 live Sport

"No excuses tonight from Manchester United. A wonderful pitch, no wind. No reason not to perform very well.

"I still have no idea what system Van Gaal is playing in his midfield. Van Persie is stuck up on his own, and that's as much as I can make of it."

Back under way at Fulham, and at Sheffield United too.

Better from Cambridge as they get dangerman Ryan Donaldson into space for the first time, he drives on and puts over a teasing cross/shot from the right - but there is nobody in amber to tap it in. Dion Dublin would've bagged.

The latest from our man from BBC Cambridge, Sam Edwards,, external who's stranded on the M6 in a broken down fans' coach with a cluster of disgruntled Cambridge supporters:

@edwardssport:, external Still awaiting pick-up. Coach is now just one junction away. So driver tells me.

Will he get to the Theatre of Dreams in time for the second half? It's been a nightmare so far...

All Manchester United now, it's very comfortable. Cambridge haven't looked like hurting their illustrious opponents since that golden chance in the opening minute.

We are able to bring you the goals from two of tonight's FA Cup replays - and you can see Fulham's opener now. Just use the Highlights tab at the top of your screen.

Le Millenium: Here comes the onslaught.

Elliot Leaver: United could get quite a few here.

Francis Brookes: Steve Claridge, watch and learn...

Get in touch on Twitter using #bbcfacup,, external text us on 81111 (UK only), or leave a message on the BBC Sport Facebook, external or Google+ page., external

That goal probably ends this tie as a contest, Bradford came from 2-0 down to beat Chelsea, but that was miraculous. Cambridge's gameplan of containment certainly needs a major tweak.

Former Cambridge forward Steve Claridge on 5 live Sport

"I think that's the first time from a Cambridge perspective, from the two games, that you can say they switched off. Fellaini was completely left alone. He was unmarked, able to take it down, and he had a strike. It didn't work, and yet United were still able to get the ball back in the box and score."

Marcos Rojo has his first goal for Manchester United, and it's more direct play which does the trick. Marouane Fellaini has a shot blocked from a corner, Robin van Persie returns it with a deft chip and Rojo loses his marker to head home powerfully.

Image source, Getty Images

Southend United manager Phil Brown
BBC Radio 5 live sports extra

"It's a good FA Cup tie. Fulham were on the back foot for the first 25 minutes but they took the lead against the run of play and then have come back into the game.

"Their front three of Ross McCormack, Cauley Woodrow and Hugo Rodallega can cause Sunderland problems. Sunderland will have to be weary of being hit on the counter-attack as they push for an equaliser."

Cambridge defender Richard Tait loses his boot in the build-up but keeps on his man, almost cutting out a cross which runs into the path of Paddy McNair. The defender laces in a drive, really travelling, but it is well blocked by Josh Coulson.

Image source, AP

Jack Blackburn: 114 minutes. It took Man Utd longer to score against Cambridge than it did for JK Simmons to destroy that kid in Whiplash....

David Shaw: Get in, Mata! Spanish magician.

DSSBrooks: United go 1-0 up. Finally. Slow handclap for Louis.

Get in touch on Twitter using #bbcfacup,, external text us on 81111 (UK only), or leave a message on the BBC Sport Facebook, external or Google+ page., external

Jamie Murphy's goal seven minutes before the break lifted Sheffield United after a sluggish start, and Jose Baxter almost gets a second just before the break, but Thorsten Stuckmann gets down to his left to save well. On the balance of first-half play, Preston can count themselves a little unlucky.

As it stands then, Sheffield United will host Manchester United in the fifth round.