United have Adnan Januzaj back on the bench tonight after an underwhelming loan spell at Borussia Dortmund. I'm a fan of his approach to the warm-up. While the majority of his team-mates have a few sprints and a drill or two, he's on his own doing kick-ups. Maverick. 

Join Gary Lineker, Dan Walker,  Alan Shearer, Robbie Savage and Peter Schmeichel from the iPro stadium at 19:30 GMT.

You can watch live on BBC One or at the top of this page - wherever you are in the UK.

Lynda Cosgrove: ‏United v. Derby. United for the win & LVG to stay! I stay true to my team, no matter who the manager is!!

Kyle: With the money he has spent and the dour football they have played, he has to go. They haven't improved since Moyes left.

David de Gea is out going through his warm-ups for Manchester United - one man who may be interested - he may not be of course - to hear that Fifa have granted Real Madrid and Atletico Madrid a provisional suspension of their one-year ban on registering new players pending the outcome of their appeals.

Will Real be able to sign players in the summer after all? We shall see. A few lawyers will be trousering some Euros, that is for sure. 

Tonight we're asking you to gaze into your crystal balls and finish these sentences for us:

If LVG stays, this season will...

If LVG goes, this season will...

Antony Eaton: 1. Ruin the club by failing to win anything or get Champions League. 2. Give us a chance of improvement.

James Barlow: If he stays he has to get top four (top two is way beyond our capabilities). If he goes write off this season and aim for top six, bring some more youth through to pressure under performers.

Karena Goodwin: 1. Go down in the hall of shame. 2. Be embarrassing.

Famously, former United boss Sir Alex Ferguson was under pressure three years into the job at Old Trafford when his team faced Nottingham Forest in the FA Cup third round in January 1990.

It was thought defeat would cost Ferguson his job, but United won 1-0 and he went on to become English football's most successful manager.

Mark Robins - goalscorer that day - gets asked about that goal every 47 minutes of his life.

Image source, Getty Images

Asked whether the FA Cup could become his saviour, former Barcelona, Bayern Munich and Ajax boss Van Gaal said: "Of course."

But would United really sack him now?

Derby have conceded seven goals in their last two games including a 4-1 thumping by Burnley on Monday but boss Paul Clement sticks with the same team. Former Norwich striker Chris Martin starts up top and will be supported by Nick Blackman and Tom Ince on either flank.

Derby XI: Carson, Christie, Keogh, Shackell, Warnock, Thorne, Ince, Butterfield, Johnson, Blackman, Martin  

Manchester United boss Louis van Gaal makes two changes to the team which lost 1-0 at home to Southampton last Saturday. Guillermo Varela comes in for the injured Matteo Darmian at right-back with Juan Mata in for Ander Herrera in midfield. 

Man Utd XI: De Gea, Varela, Smalling, Blind, Borthwick-Jackson, Fellaini, Schneiderlin, Mata, Lingard, Martial, Rooney

Tonight we're asking you to gaze into your crystal balls and finish these sentences for us:

If LVG stays, this season will...

If LVG goes, this season will...

Jack: If LVG goes, this season will end with Champions League football next season, a top-three finish and a starting line up without Fellaini

Octavius Brine: If LVG stays on this season it means the United board have clearly lost the plot, there's no redemption even if he wins the FA Cup

Manchester United manager Louis van Gaal: "When you lose it is more worse and I predicted already, before the game against Southampton, that I cannot lose any more because I am then condemned for the fourth time that I have been sacked. Maybe then you have written the truth, because sometimes it happens."  

Image source, .

Louis van Gaal's opposite number Paul Clement knows what pressure is like at a big club, having been an assistant to Carlo Ancelotti at Chelsea, Real Madrid and Paris St-Germain.

And now he is also experiencing the pressure of management for the first time.

"When you go two games without a win at Real Madrid it's a crisis, but you don't feel it like the manager does," said Clement, whose Rams side have dropped out of the automatic promotion places in the Championship following a winless five-game run.

"When you're the manager all thoughts are on team selection. You have to block out the noise. I know a good performance and a win is around the corner."

Image source, PA

And he has sympathy with Van Gaal too.

"The man who followed Sir Alex [David Moyes] had his difficulties, and now the next man in has had some difficulties too," said Clement. "But coaches need time to develop what they want to do."

Is LVG's time up? That's the killer question.

"Is that pitch square?"

"Course it is boss, yep..."

Tonight we're asking you to gaze into your crystal balls and finish these sentences for us:

If LVG stays, this season will...

If LVG goes, this season will...

James Pearse: 1. Get worse 2.Get slightly better.

Möhiuddin Khän: 1. Be destroyed 2. Be saved

Nathan: ‏1. If LVG stays, this season will have been a disaster. 2. If LVG goes, this season will have been a disaster.

BBC Radio 5 Live

As well as our online coverage and TV pictures, the BBC can also offer you the very best in radio coverage tonight.

Presenter George Riley is joined at the iPro by commentator Conor McNamara and summariser Chris Waddle.

Magic.

Tune in on your radio, or on your phone/tablet/pc/laptop/watch/any other smart device I don't yet know about at the top of this page.

Click 'live coverage.' 

Manchester United

In come Guillermo Varela and Juan Mata, out go Matteo Darmian and Ander Herrera.

Full line-ups to come.

"If there's any chance to beat Manchester United it is now." That's what legendary Red Devils keeper Peter Schmeichel reckons. 

The Great Dane has been showing that he is down with the social media scene, using Facebook Mentions to preview tonight's match from the iPro Stadium gantry.

Head over here to see what Peter and Dan Walker have got to say for themselves., external (Unless you're Robbie Savage - he gets, er, savaged by Peter.)

Image source, BBC Sport

The Derby team news is in - and it's simple. It's the same XI which were hammered at Burnley on Monday night. 

Tonight we ask you to gaze into your crystal balls and finish these sentences for us:

If LVG stays, this season will...

If LVG goes, this season will...

You can text us on 81111 (UK only with your names on them) or tweet us at #bbcfacup.