Image source, PA

Luke Chadwick starts a game at Old Trafford tonight for the first time since December 2001. That was a 1-0 defeat by West Ham, and he was replaced on the hour mark by a certain Mr D. Beckham.

I can confirm that Beckham is not on the bench for Cambridge tonight.

BBC Radio 5 live

Image source, @marksaggers

Dave Matthews Jones, chairman of Cambridge Fans United, on BBC Radio 5 live:

"I had to scrape the snow off the car this morning. I went into work early, then nipped out, got on the coach and am making my way up. The coaches left Cambridge at 1pm - plenty of time to get up there early.

"In the last 12 months we have already been to Wembley twice. We won both times and we have a fantastic manager, Richard Money, who prepares the team well.

"Louis van Gaal seems to be worried about us, and we're at Old Trafford to cause an upset. If they don't show up, or if we get a goal early and they panic, then anything's possible. There have been Cup upsets in the past and it's only 11 v 11. The Amber Nation is in Manchester tonight. We won't be fazed inside Old Trafford."

Sunderland

Vito Mannone plays in goal for Sunderland with Costel Pantilimon dropping down to the bench, while Ricardo Alvarez and Emanuele Giaccherini also start. Adam Johnson is out after needing surgery on a thumb injury and Sebastian Larsson also misses out.

Sunderland XI: Mannone, Reveillere, van Aanholt, Vergini, O'Shea, Bridcutt, Gomez, Alvarez, Giaccherini, Wickham, Defoe.

BBC Radio Cambridgeshire's Sam Edwards reports that around 1,000 or so Cambridge fans will not be at Old Trafford for kick-off or any of the build-up after traffic trouble on the M6. He is on one of the fans' coaches and it is currently 47 minutes away, but that is without factoring in parking and walking to the ground. Kick-off in 49 minutes.

BBC Sport's Simon Stone at Old Trafford: "More than 6,000 Cambridge fans will be at Old Trafford tonight - and they have no intention of being put off by ticket prices in excess of £40.

"It was £46 for each adult and £18 for the child's," said Tim Heffer, a Cambridge fan of 31 years, who was at the game with partner Kerry, family friend Michael and 11-year-old son Luke.

"By the time we have paid for petrol there won't be much change from £250.

"We wouldn't miss tonight though. In all my time following the club there has never been an occasion like this."

He is not expecting the visitors to claim a fifth round tie with Sheffield United or Preston though.

"If we only lose 3-0 we will have done well," he said.

The big news for Cambridge United is the fact that ex-Manchester United man Luke Chadwick starts. He is one of two changes from the side beaten at Luton at the weekend.

Cambridge XI: Dunn: Tait, Coulson, Nelson, Taylor: Chadwick, Champion, McGeehan, Donaldson; Elliott, Simpson.

Image source, AP

It's an all League One affair at Bramall Lane, in fact it's fourth v sixth.

North End have hit a sticky patch of form though, with no wins in their last seven games in all competitions, while the Blades were mighty close to taking Spurs to extra time in last week's League Cup semi-final.

Advantage Nigel Clough?

With a potential home tie against Manchester United on the cards, there's a lot at stake...

This evening Manchester's tram system, the Metrolink, has been flooded by fans of both sides, all heading to a floodlit Old Trafford.

The chanting and banter was in full fly, including this little gem:

Supporters in red: "You need a new stand, you need a new stand! You're at Old Trafford, cos you need a new stand!"

Supporters in amber: "Dah dah dah! Thank you for the toilets! Dah dah dah! Thank you for the toilets."

Highbrow stuff. Not sure the usual commuters were loving it, mind...

BBC Sport's Simon Stone: "One player not involved at Old Trafford tonight is Jesse Lingard, who joined Derby on loan for the remainder of the season yesterday. Manchester United are committed to Lingard though. The midfielder has agreed a new two-and-a-half year contract at United and Louis van Gaal paid a warm tribute to the 22-year-old in the match programme ahead of tonight's FA Cup replay with Cambridge.

"Jesse was desperately unfortunate to sustain a knee ligament injury on his debut for the club on the opening day of the season," said the Dutchman. I have been impressed by Jesse's determination during his rehabilitation."

BBC Radio 5 live

Dave Doggett, Cambridge United chairman, on 5 live Breakfast: "Old Trafford is not a stadium we play at regularly, in fact I think the last time were were there was 23 years ago.

"We know the players will do us proud as they always do - they will go out and enjoy the occasion. We'll have over 6,500 supporters there and hopefully the atmosphere they'll create will inspire our players.

"This is the great thing about football - until the final whistle we'll still be in the tie. It's a great occasion and something we're really looking forward to. It would be great if we manage to hold out, and if it goes to penalties I'll be left with a few fewer fingernails!"

Man Utd

Manchester United make five changes from the side which beat Leicester at the weekend - but it remains a formidable looking line-up. Juan Mata is back in.

Ma Utd XI: De Gea, McNair, Smalling, Evans, Rojo, Blind, Fellaini, Mata, Rooney, Di Maria, Van Persie

Cambridge United chairman Dave Doggett said that he intended to spend a large chunk of the £1m generated by tonight's game on improving the toilets at the Abbey Stadium.

Image source, PA

The FA Cup remains a game-changing competition for some clubs. There are certainly more exciting things to spend money on, but sometimes we all have to swallow a dull, but necessary purchase.

So what is the most depressing purchase you have ever had to make? A large, wallet-draining expense on something you knew full well you would gain no joy from at all.

I'm talking new carpets. Having a new boiler fitted - four grand I was quoted last week! Four thousand pounds! - stamp duty, estate agent fees. Wedding rings. That sort of thing. I'm sure you can do better.

Get in touch at #bbcfacup, external, pop on to the BBC Sport Facebook page, external or BBC Sport's Google+ area., external

You can also text us on 81111 in the UK only - don't forget to say who you are and where you are texting from.

A reminder for you of the FA Cup fifth-round draw as it stands:

Crystal Palace v Liverpool or Bolton Wanderers

Arsenal v Middlesbrough

Aston Villa v Leicester City

West Brom v West Ham

Bradford City v Sunderland or Fulham

Blackburn Rovers v Stoke City

Derby County v Reading

Preston NE or Sheffield Utd v Cambridge Utd or Manchester Utd

And Premier League Sunderland will also be hoping to make it into round five after a replay at Fulham.

Only one of the last 10 matches between Fulham and Sunderland has ended as a home win (five draws, four away wins). The Black Cats have lost just one of their last nine FA Cup matches against lower league opposition (W5 D3 L1).

Is that the whiff of penalties I sniff in the air?

There are three FA Cup replays tonight. The TV cameras may be at Old Trafford but we will also bring you all of the developments at Bramall Lane.

Sheffield United have won 12 and lost just two of their last 17 FA Cup matches, while Preston have won just one of their last 19 away trips to Bramall Lane - losing 13.

Image source, Getty Images

Tonight's game is expected to generate £1m or so for Cambridge in gate receipts and TV money. A million pounds to Manchester United may not seem much - Radamel Falcao's wages for a few weeks - but for a side in League Two fresh from non-league it is a game-changer.

Manager Richard Money is under no illusions as to what the game means for his club.

"If you go to Las Vegas and you play those fruit machines and you win the jackpot - that's probably what the draw was, in terms of Cambridge versus Man United," he said., external "To get the replay probably means we bought a lottery ticket and won. Now we've bought a EuroMillions ticket.

"The percentage of chance diminishes because of it but because you've got a ticket you do have a chance. That's how I feel. To go there with no belief would be dangerous but we're well aware of the task in front of us."

The Cambridge players and staff have already been out on the pitch at Old Trafford, lapping it up and taking plenty of souvenir shots too.

Which United players will they be facing? We'll have team news shortly.

Cambridge defied the odds to hold Louis van Gaal's Manchester United to a 0-0 draw at the Abbey Stadium 10 days or so ago, and now they face an even bigger challenge at Old Trafford.

For the winners, a fifth-round tie away to either Sheffield United or Preston awaits.

Could the U's make it to the last 16?

What's the most money you've ever made in one day?

Image source, Getty Images

A mammoth overtime shift, overnight, on a Sunday?

Image source, Getty Images

Sold a car, a family heirloom, or maybe even a house?

Won the mega-rollover pub quiz, the bingo or even the lottery?

Image source, Getty Images

I didn't think so. After all, it's not very often you can scoop a large chunk of dough in just one day.

But tonight, League Two side Cambridge United are in line to make as much as £1m from an FA Cup replay at Old Trafford. Kerching!