Postpublished at 58 mins
Huddersfield 0-2 Man Utd
There was a mini pitch invasion after that second goal, with a few Manchester United supporters running on to celebrate with Romelu Lukaku.
Summary
QF draw: Man Utd v Brighton, Leicester v Chelsea
Sheff W/Swansea v Rochdale/Tottenham, Wigan/Man C v Southampton
Lukaku scores goal in each half for United
Mata strike ruled out by VAR for offside
Postpublished at 58 mins
GOAL - Huddersfield 0-2 Man Utdpublished at 55 mins
Romelu Lukaku
Lead. Doubled.
It is clinical stuff from Romelu Lukaku, the Belgian runs almost the entire length of the pitch to score.
The striker starts the move from his own area, passing it out to Alexis Sanchez.
The Chilean then has the skills to hold the ball up and play it through to his team-mate.
Like his first goal, Lukaku holds off a home defender and slides a low finish past Jonas Lossl.
Image source, ReutersPostpublished at 54 mins
Huddersfield 0-1 Man Utd
Philip Billing is the man this time, winding his left foot up, but hits it straight into the mid-riff of Nemanja Matic in the wall.
Billing has another pop but cannot find a way past the Serbian again.
United break...
Postpublished at 53 mins
Huddersfield 0-1 Man Utd
Another free-kick for Huddersfield and Danny Williams tries to burst clear but is clipped by Alexis Sanchez 25-yards out, dead centre.
United are defending very wellpublished at 18:45 Greenwich Mean Time 17 February 2018
Huddersfield 0-1 Man Utd
Steve McClaren
Ex-England manager on BBC Radio 5 liveUnited haven't sorted out stopping Huddersfield's right-hand side.
So many of their opportunities have come down that side.
United are getting blocks and headers in. They are defending very well but they have to do more when they are out of possession.
CLOSE!published at 51 mins
Huddersfield 0-1 Man Utd
Tom Ince's driven free-kick takes a nick off the ball and falls nicely for Rajiv van La Parra in the box, but the Dutchman slices his attempt.
What a chance that was, he was only seven-eight yards out.
Image source, Getty ImagesPostpublished at 50 mins
Huddersfield 0-1 Man Utd
A delay in taking the free-kick as Luke Shaw has not retreated the full 10 yards.
Postpublished at 49 mins
Huddersfield 0-1 Man Utd
Huddersfield are continuing the second half like they played throughout the first, making inroads down the right-hand side.
They get a free-kick on the edge of the box after Luke Shaw blocks Colin Quaner off the ball...
GetInvolvedpublished at 18:40 Greenwich Mean Time 17 February 2018
#bbcFACup or text 81111 (UK only)
David Bushell: Didn't know VAR stood for Complete and utter guesswork.
Adam: I don’t think I can watch FA Cup on the basis that VAR causes my blood pressure to go through the roof.
Gorg Ed Hidar: Another failure for VAR - Mata was level (i.e. onside) and the blue lines on the pitch didn’t even look like they were drawn straight. Robbery.
Image source, Rex FeaturesPostpublished at 47 mins
Huddersfield 0-1 Man Utd
I don't want to talk about VAR, but unfortunately it has cast a gloomy shadow on this game.
Will there be an "inquest"?
get involved Get Involvedpublished at 18:38 Greenwich Mean Time 17 February 2018
Huddersfield 0-1 Man Utd
The absent Manchester United goalkeeper's reaction to VAR...
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End of twitter postKICK-OFFpublished at 46 mins
Huddersfield 0-1 Man Utd
Away we go again.
Someone just lamp one into the top corner please, we won't need VAR for that.
get involved Get Involvedpublished at 18:37 Greenwich Mean Time 17 February 2018
#bbcFACup or text 81111 (UK only)
Just seen the freeze frame they used at the VAR HQ. The line for deciding offside (and the others) aren't parallel with the lines on the pitch... that's just incompetent.
Tony in Manchester
I thought the whole point of this technology was to get the decision 100% right, 100% of the time? That was a clear goal.
Joe Dempsey, Lancs
The linesman kept his flag down so VAR has been used to change a correct decision to an incorrect decision. Bizarre!
Chris, Manchester
Don't miss out on the FA People's Cup!published at 18:36 Greenwich Mean Time 17 February 2018
#FAPeoplesCup
So, you've got less than three days to get involved with the country's most inclusive and free five-a-side competition - the FA People's Cup.
Don't worry, we'll show you how to sign up.........
Media caption, FA People's Cup: Quick guide to show you how to sign up
If you want to know more and head straight to the sign-up link - just head here.
But don't leave it too late - the deadline to sign up is midnight tomorrow, 18 February.
See you out there hopefully!
WATCH: La Parra goes close for Huddersfieldpublished at 18:34 Greenwich Mean Time 17 February 2018
Huddersfield 0-1 Man Utd
Rajiv van La Parra heads straight at United keeper Sergio Romero, after a cross from Danny Williams.
Postpublished at 18:33 Greenwich Mean Time 17 February 2018
Huddersfield 0-1 Man Utd
I am looking at the replay of Juan Mata's disallowed goal again.
VAR official Neil Swarbrick has not even got his squiggly lines straight. In fact, they are not even parallel to the 18-yard line!
VARy interestingpublished at 18:31 Greenwich Mean Time 17 February 2018
Huddersfield 0-1 Man Utd
Alistair Yeomans
BBC Radio 5 live at HuddersfieldSo VAR comes into it big time.
United have a goal chalked off.
Mourinho had a long discussion with David Wagner before the decision but seems reasonably calm on the touchline.
Image source, Getty Imagesget involved Get Involvedpublished at 18:29 Greenwich Mean Time 17 February 2018
#bbcFACup or text 81111 (UK only)
James Dale: Anyone who doesn't think this is too long needs to quit football and find another sport. Ruining the game.
Michael Reid: I wonder if the referee is also going to add on the three minutes it took for a decision to be made because of the VAR?
Thomas Measures: What a joke VAR is. Should be only be there to overturn obvious decisions.
How VAR works - a reminderpublished at 18:27 Greenwich Mean Time 17 February 2018
Confused?
Referees' chief Mike Riley explains how the video assistant referee (VAR) system works. It was first used in English club football in the Brighton-Crystal FA Cup third-round tie on 8 January.
Hit the play button below.
Media caption, How does VAR work?
Correct decision?published at 18:25 Greenwich Mean Time 17 February 2018
Huddersfield 0-1 Man Utd
Steve McClaren
Ex-England manager on BBC Radio 5 liveWe've got the correct score at half time. Without VAR it would have been incorrect
As managers, we are looking for VAR to get the major decisions right.