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On the subject of Cambridge United v Manchester United, we have a live text commentary under way with Tom Rostance on the BBC Sport website. You can also listen to live coverage on BBC Radio 5 live from 19:00 GMT, or watch with Gary Lineker and the Match of the Day team on BBC One from 19:30 GMT.

Or, if you'd prefer, you can join our live text commentary on the Africa Cup of Nations match between South Africa and Senegal - in what is proving to be a very unpredictable Group C.

Whichever you choose, enjoy the rest of your sporting evening. Goodbye from us.

Dion Dublin played as a striker for Cambridge United and Manchester United in the early 1990s - and while his head predicts an away win tonight, his heart wants a draw.

He tells the BBC World Service: "I would love Cambridge to get a draw and go back to Old Trafford. Manchester United would win the tie over two games if it went that far, but I just want the club to make a bit of money and I want the fans to get a bit of value out of this incredibly special occasion that's happening at the Abbey."

Reserve team and academy manager Dermot Drummy has left Chelsea after eight years at the club.

The former Arsenal coach - who led Chelsea to the FA Youth Cup in 2010 and the Under-21 Premier League title last season - is leaving to pursue a career in the senior game.

Bournemouth defender Adam Smith says their Championship promotion push will not distract them from their FA Cup fourth-round trip to Aston Villa on Sunday.

"Things are going well at the minute," he tells the Football Association website. "The lads won't be scared going into this game. We are just looking forward to testing ourselves against another top side.

"Hopefully we can beat Villa and then go on a bit of a run, like we did in the League Cup. We are looking to go on another good run and we'll see where that takes us."

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Or could the shock be at the Amex Stadium on Sunday? Brighton manager Chris Hughton is wary of facing Arsenal in the FA Cup, but insists his players need no extra encouragement for the fourth-round tie.

"I certainly won't need to motivate the squad, but you still need a game plan that gives you a chance," the 56-year-old former Norwich manager told BBC Sussex.

"In the last few seasons if they have made changes for any of the cup competitions, they fielded good young players and the age of the team would have gone down dramatically,"

"Now, any changes that they make are significantly more experienced players. That shows the quality and depth of their squad."

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Perhaps the big upset will be at Stamford Bridge, where League One side Bradford City will look to turn over Premier League juggernauts Chelsea. A long shot, admittedly, as Bradford boss Phil Parkinson says Chelsea manager Jose Mourinho's success is down to his willingness to adapt.

In 15 years, Mourinho has won 16 major trophies in spells with Porto, Chelsea, Inter Milan and Real Madrid.

"All the time it's 'philosophy' but no one's so good to say 'we play like this irrespective'. He respects opposition and makes plans to win games - that is why he is so good," said Parkinson.

Earlier, we asked you to vote for the FA Cup fourth-round tie you think is likeliest to produce an upset. The top answer, as Les Dennis used to say on Family Fortunes, was Aston Villa v Bournemouth, with 37%. But some of you aren't quite sure which result would be the upset:

Adam Koston:, external Can't see many upsets this weekend. Villa-Bournemouth would be a huge one. Can't see Villa pulling it off, though.

Benny Walsh:, external Most likely upset: Villa v Bournemouth. Just to be clear, which winner would constitute an upset?

Arthur Fane:, external Only shock is that people think a Bournemouth win at Villa Park would be an 'upset' - only six places below and in excellent form!

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The lure of the Sydney lifestyle is one of the main reasons behind Joe Burgess' decision to reject a new contract with Wigan.

The 20-year-old will quit Super League at the end of the season to take up a three-year deal with 2013 NRL champions Sydney Roosters, where England coach Steve McNamara is on the backroom staff.

"It's a sad one for us all," Wigan director Kris Radlinski said. "After many discussions it was clear Joe had made his mind up. I said 'do you want me to put Wigan's best possible offer to you?' He said 'no, I want the Sydney lifestyle and to try the NRL'."

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More from former Cambridge United and Manchester United striker Dion Dublin has been speaking to the BBC World Service as the two clubs prepare to meet each other in the FA Cup fourth round tonight, live on BBC One.

He thinks that, even though Louis van Gaal's side will face an intimidating atmosphere at the Abbey Stadium, they will be able to cope, saying: "I don't think it'll be uncomfortable. It's down to the individual to respect where they are going to and where those Cambridge players are trying to get to.

"You've got go there and say: 'In order to beat them, we are going to have to be at the top of our game.' I think Manchester United will have too much quality but it's applying that quality on the day. Cambridge will come out absolutely flying."

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Following the signing of Wigan's 2013 FA Cup final match-winner Ben Watson earlier today, Watford have agreed a contract with former Bordeaux defender Vujadin Savic.

The 24-year-old Serb left the French club last summer, but has been on trial at Vicarage Road and will now stay for the rest of the season.

Both players could make their debuts against Blackpool on Saturday.

Late, late, late drama at the Africa Cup of Nations in Mongomo. The match was fizzling out, time was just about up. And then.... former Sunderland striker Asamoah Gyan burst on to a long ball out of defence and slotted in a Ghana winner from a narrow angle.

That was enough to give victory to Avram Grant's side, who are now one of three teams in Group C on three points. South Africa, the only team in the group with none, face Senegal at 19:00 GMT.

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League Two Cambridge United host Premier League giants Manchester United as the FA Cup fourth round begins tonight, and the whole match is live on BBC One, with coverage beginning at 19:30 GMT.

Dion Dublin played for both clubs as a striker in the early 1990s, and has told the BBC World Service that it could be a slog for Louis van Gaal's side this evening.

"It will be hostile, I hope. and I hope United will have to dig deep into their inner selves and go back to where they started. It's not going to be pretty. The changing rooms aren't big. They will have to bob their head down to go down the corridor that takes them to the changing rooms. Everything is going to be different."

Tom Homer is expected to complete a move to Bath after London Irish confirmed the full-back will leave this summer.

The 24-year-old, who has scored 780 points in 110 appearances for the Exiles, would be a replacement for Gavin Henson, who will join Bristol at the end of the season.

"We did everything in our power to persuade Tom to stay at the club, however, he feels that his future is elsewhere," said operations director Bob Casey.

Rob Tennant:, external Think Bristol City may cause the upset against West Ham - putting a sneaky £10 on them.

Jason Tucker:, external Bournemouth vs Aston Villa has got cup upset written all over it.

Adam Twaits:, external Hope United fans eat before they get to the Abbey. Had the worst burger of my life in that away end!

Adam's an Ebbsfleet fan who, according to his Twitter feed, once cooked a steak for Daniel Bedingfield's dad. That's nothing, Adam. One of today's Sportsday commentators once had his electricity meter read by Edwina Currie's daughter. True story.

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Carlisle United have signed striker Charlie Wyke for an undisclosed fee from Championship side Middlesbrough. The 22-year-old, who has agreed an 18-month contract, scored four goals in 14 games while on loan at Carlisle's League Two rivals Hartlepool United before his loan expired in November.

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The Africa Cup of Nations has been a tournament of draws so far - seven of them in the opening 12 matches. There's another one on the cards in Mongomo, as Ghana and Algeria are locked at 0-0 with an hour gone. It hasn't been a thriller, although there has been the odd imitation of a Saturday night post-club taxi queue, as the photo above demonstrates. James Gheerbrant and Emlyn Begley are keeping their eyes on the action for the BBC Sport website's dedicated live text commentary.

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Bradford City manager Phil Parkinson and assistant Steve Parkin have both been fined £1,000 after admitting to a Football Association misconduct charge.

The pair were charged for an incident during the Bantams' FA Cup third-round replay win over Millwall on 14 January.

An early foul by Lions skipper Alan Dunne triggered an on-field melee, and saw Parkinson and Parkin both sent off.

Image source, AP

It wasn't that long ago that Luis Suarez was scoring at will for a Liverpool side making a serious push for a first league title since 1990. Brendan Rodgers has missed the striker this season - but Suarez has not exactly been a runaway success at Barcelona.

Suarez, a £75m signing in July, has scored five goals in 16 matches for Barca since completing a ban in October, but coach Luis Enrique has backed him to find form.

"No aspect of Luis Suarez's game worries me and I'm sure he's going to score goals," Enrique says.

Former Real Madrid winger Royston Drenthe has left Reading to join Turkish side Kayseri Erciyesspor.

The 27-year-old made 24 appearances for the Royals after signing from Russian side Alania Vladikavkaz in 2013.

Drenthe spent the first half of this season on loan at Sheffield Wednesday, making 15 appearances for them.

Thank you for voting. Championship leaders to beat Premier League strugglers? We shall see on Sunday.