Change for the visitors.

Alexis Sanchez makes way for Anthony Martial.

15 to go.

Image source, Reuters

Tell you what though, a Huddersfield goal in the next few minutes and the visitors will get nervous.

Philip Billing moves the ball from left to right, but his dipping shot from outside the box is parried away by United goalkeeper Sergio Romero.

United look much happier now and are knocking the ball around comfortably, suddenly they all want a touch.

Romelu Lukaku is looking for a hat-trick and shifts the ball to his right peg, but his effort is blocked by Town defender Christophe Schindler.

Tom Ince trying to wriggle clear against the club his dad Paul served so distinctively for in the 90s, but the winger's shot is blocked by Chris Smalling.

Showing my age there.

Image source, AFP

Time to shake it up.

Couple of changes for Huddersfield, as Florent Hadergjonaj and Terence Kongolo make way for Tommy Smith and Scott Malone.

20 minutes left.

Romelu Lukaku clinically finishes after being put through by Alexis Sanchez, doubling United's lead in the process.

Steve McClaren
Ex-England manager on BBC Radio 5 live

Manchester United are winning because they have dealt with everything Huddersfield have thrown at them in defence.

And their front three have been devastating. That's how they win games.

It's a different era now, its not Sir Alex Ferguson. It's Mourinho's now - this is how he wins matches and wins trophies.

This is a different way of winning. United fans were complaining a few years ago that they weren't winning matches. Mourinho is developing this team - he got them back in the Champions League.

That second goal looks to have knocked the stuffing out of Huddersfield. They have exerted a lot into this game.

We may see United dominating possession now.

Still plenty of time though.

This time there was no need to consult VAR, as Nemanja Matic was clearly offside and the score remained 0-1.

Richard: Harry Kane and Sergio Aguero are clearly the best No.9s in the league. But is anyone doubting Lukaku is a better buy than Morata now?

Jerry Elumeze: Disappointing performance all right, but what a superb second goal and build up.

Jide Yusuf: It's not the same Man Utd and I think the problem is with Mourinho, even when victory is near like here, it's not the same.

Steve McClaren
Ex-England manager on BBC Radio 5 live

If United get the next goal then they'll win easily.

But if Huddersfield get it, then it will be all hands on deck.

Huddersfield have to keep believing they can do it. They have played well.

Image source, Getty Images

Huddersfield taking chances going forward and leaving gaps open at the back.

Juan Mata shows pace - where did he get that from? - to run clear into the box, but his cutback is collected by home goalkeeper Jonas Lossl.

Juan Mata, and most of the people in the ground, thought he had doubled Manchester United's lead, but referee Kevin Friend and video official Neil Swarbrick decided otherwise.

Controversial? Just a bit...

OK listen up, the next update is an important one so have a look and judge for yourselves...

Still sloppy from United at the back, as Ashley Young plays the ball straight out for a corner.

Goalkeeper Sergio Romero comes off his line to punch it away and the visitors are on the counter again.

This time the move breaks down through Juan Mata's mis-placed pass.

An hour gone, Huddersfield have it all to do.

Alistair Yeomans
BBC Radio 5 live at Huddersfield

Sanchez and Lukaku combine. 0-2.

Bizarrely, a child ran on from the United end, is embraced by Sanchez and then carried off the pitch.

Yullaw: Here’s the killer blow! Brilliant counter attack play by Man Utd.

Paul Gourley: Feed the Rom and he will score.

Romelu Lukaku has now scored 11 goals in his last 10 FA Cup appearances.

Image source, Reuters

Steve McClaren
Ex-England manager on BBC Radio 5 live

United are doing a job. They have done a job on Huddersfield.

They soaked up the pressure and it was Sanchez this time who provided the ball for Lukaku.

He has the strength to hold everybody off and that is why they paid the big money for him.

United can get three chances and score two of them.