Have you ever wondered about the maths behind a dream FA Cup draw?

Just what are the odds of your team landing a glamour tie in the FA Cup?

You can find out more via the BBC's iWonder guide.

Also in the FA Cup this evening, MK Dons take on Chesterfield in an all-League One FA Cup second-round replay.

Chesterfield won the first game 1-0 but have been forced to replay the match after fielding an ineligible player.

The winners are away to Scunthorpe United in the third round.

Dan Walker
BBC Sport

On Twitter:, external Off to @Blyth_Spartans v @bcfc with @chriswaddle93 & @Higginbotham05 for Football Focus tomorrow. 1210 on @BBCOne

Image source, @dcfcofficial

As reported earlier (see 12:06), Derby have completed the loan signing of Aston Villa striker Darren Bent., external

The 30-year-old, who has 13 caps to his name for England, has joined the Rams for the remainder of the campaign.

Image source, @coyle1826

We're asking you to share your FA Cup third round excitement using #getcarriedaway, external

John Coyle has tweeted this picture, external of his own personal Road To Wembley this season: On my way to Millwall v Bradford Sat. for my 10th match since starting in August at Silsden

Image source, PA

Ahead of the third round, if you missed BBC Three's special countdown of the FA Cup's 50 Greatest Moments on New Year's Eve, you can catch up again on the BBC iPlayer.

Presented by former England captain Rio Ferdinand and Helen Skelton, it features contributions from Thierry Henry, Ryan Giggs, Steven Gerrard, Michael Owen, Vinnie Jones, Gary Lineker and Ruud Gullit as well as comedian Russell Brand and pop stars Olly Murs, Louis Tomlinson, Wretch 32 and Eliza Doolittle.

Caretaker manager Keith Millen on when Alan Pardew may be confirmed as manager: "I can't give you a timescale on it. We thought we'd be in a position to make an announcement today when we spoke yesterday, but it looks like being tomorrow now.

"A new manager will come in which will hopefully be a spring in our step and help us survive.

"We've had to share our thoughts on transfer targets with Alan. He knows what we feel we need and has seen the squad over the past games."

More from Crystal Palace caretaker manager Keith Millen: "We're preparing for Alan to take training tomorrow but he'll pick the team.

"He left training to myself and Ben Garner today, he was in the office sorting things out."

Talks are continuing between Alan Pardew and Crystal Palace over a contract to become the club's new manager.

Caretaker manager Keith Millen was speaking to reporters earlier and confirmed Pardew will take his first training session with the squad tomorrow.

"There's no problems at all (over a contract), it's just taking a bit longer than expected," Millen said.

Image source, Getty Images

Southampton manager Ronald Koeman speaking ahead of his side's match against Ipswich on Sunday: "I remember when I was a young kid watching the FA Cup final from Holland - I always wanted to play some sort of part in the competition in my career.

"The Cup final sounds like a special day. I remember speaking to Ruud Gullit about his experiences with Chelsea and it sounds like something I'd love to be involved in.

"It's a long way to Wembley and you have to beat a few teams to get there, but it all starts on Sunday."

Image source, Andrew Nicholson

Sportsday will be building up to a weekend of FA Cup third round action across the BBC until 22:00 tonight.

We'll have all the team news and previews ahead of all the weekend's ties.

Share in the build-up with us by tweeting your messages and pictures using #getcarriedaway, external

Blyth Spartans supporter Andrew Nicholson is first off the mark with the above picture, simply adding "helmets ready".

Image source, @BurnleyOfficial

Burnley have confirmed Nathaniel Chalobah has returned to Chelsea, external at the end of his loan deal.

The England under-21 midfielder made four substitute appearances for the Clarets after joining the club at the end of August.

Burnley manager Sean Dyche said: "Nathaniel will go back to Chelsea and we thank him for his efforts in his time with us.

"We hope he has developed here, albeit not on the pitch as much as he would have liked. He has, however, been an active part of the group and has been a credit to himself.

"We wish him well as he looks to further progress his career."

Image source, EPA

Breaking away from football briefly, in tennis it's a case of two days in 2015 and two wins for Andy Murray.

The British number one has beaten Rafael Nadal 6-2 6-0 in the semi-finals of the World Tennis Championship in Abu Dhabi.

The Scot, who beat another Spaniard Feliciano Lopez in the opening match of the unofficial season's opener, was too strong for the world number three, who was playing his first match of the season.

It was the 27-year-old's most convincing win against Nadal in 21 meetings and he will play either Novak Djokovic or Stan Wawrinka in tomorrow's final.

Image source, @WBAFCOfficial

New West Brom manager Tony Pulis finishes off his first news conference by responding to questions if he can keep the club in the Premier League: "You need to give me a couple of weeks, then I'll give you an answer.

"It will be difficult. Every team in bottom half of the Premier League will tell you it is.

"The infrastructure is secondary. The most important thing is the pitch, you have got to have players on the pitch to win you games. If you don't have a team to win, then all the surroundings fall away."

New West Brom manager Tony Pulis looks ahead to his first game in charge: "This place (The Hawthorns) rocks when supporters are right behind the team and we need that desperately.

"I still want to sit upstairs and have a look tomorrow. The team we will put out against Gateshead is a strong one."

More from new West Brom manager Tony Pulis: "I was with the players yesterday and today. They're a very, very decent group of lads. I can't wait to get going.

"There's been a lot said about how the club has been run in the past - the most important thing is everyone works together.

"Titles make no difference, you can call me Head Bottlewasher if you want."

Image source, @WBAFCOfficial

New manager Tony Pulis tells reporters: "It's nice to be back in football and I'm really looking forward to getting going.

"It's the right club at the right time."

New West Brom manager Tony Pulis is speaking to the media for the first time.

We'll have his reaction shortly.

Image source, @PaddyMcguinness

Comedian Paddy McGuinness honoured a promise this morning - that he would clean Emile Heskey's boots if he scored for Bolton.

The former Liverpool striker did just that against Blackburn on Boxing Day.

Paddy tweeted the above picture earlier:, external There you go, a man of my word. @EmileHeskeyUK, external boots, spotless!!!

BBC North West Tonight will have the full story this evening from 18:30.

Image source, @XabiAlonso

Bayern Munich midfielder and former Liverpool player Xabi Alonso tweets:, external My hero. My mate.