Watford, one win in eight matches, Millwall, 10th in League One and unbeaten in seven matches.

There's momentum with the underdogs, resistance working against the favourites. Upset written all over it? 

Players in a cramped tunnel. This game feels like a bit of a headache for the Hornets.

Adam Staniforth has grabbed his television guide and picked up on the feat you have before you on this January Sunday.

Enjoy, tune into BBC One now. Watford legend Luther Blissett and ex-Arsenal striker Ian Wright join Mark Chapman pitchside.

How do we see this game going? 

Lawro is taking on DJs Adele Roberts and A.Dot in his FA Cup fourth round predictions this week. Here is what they reckon.

A.Dot: I think this one is going to be fun for the neutral and there is going to be a red card or three.

Adele: Without a doubt. Just the fact that Millwall's ground is called The Den, that is what Watford are in for - come into the Lions' Den. It feels like Millwall are always up for a match like this.

A.Dot: It might be one of those games where it is really scrappy and there are not that many chances, and someone nicks it 1-0.

Adele: I need to go for a Watford win because I really like (Radio 1 DJ) Chris Stark, who is a Hornets fan, and I feel like he will hate me if I don't back them. I think Watford will put a good show on and win. 0-2

A.Dot: No, Millwall are going to score. It won't be a nice goal, it won't be a pretty goal, it will be a scrappy goal - I can see it now! - but I think Millwall will win 1-0.

Lawro is going for a 0-2 away win.

Read the rest of this weekend's predictions here.

The warm-ups are nearing their end at Millwall, balls pinging around as adrenaline pumps through the bodies of these players.

Are you seeing an upset? Or smooth Premier League progress?

Image source, Reuters

Gary Lineker explains how you can get involved in the FA People's Cup - the five-a-side tournament that could take you to Wembley.

It's free to enter for teams and individuals and there are 16 categories for age, gender and ability.

For more information on how to sign up now, check out our Get Inspired guide.

Just 20 minutes to the big off at Millwall. Outside you can buy a few nifty pin badges. 

I'll be honest with you, there was a wider photograph of these badges but it captured a number of other pins and some of them were offensive, mainly towards West Ham.

Image source, Getty Images

BBC One

Is there a better way to spend your Sunday afternoon than sat in front of the box watching FA Cup action?

There are two live matches on BBC One today starting with Millwall v Watford at 11:50 GMT - Mark Chapman is presenting from The Den for that one.

Then from 15:35 GMT Gary Lineker will be in position at Old Trafford for Manchester United v Wigan.

And if you're out and about this afternoon, you'll be able to watch both right here on this page.

That's Saturday covered. We go again and respectfully ask all of the eight sides involved today to deliver.

Jay has just been in touch regarding the whole respect the FA Cup debate. I like Jay already, very much a glass half full kind of guy.

Danny Murphy
Former England midfielder on BBC Match of the Day

Wycombe got a lot of crosses into the box. Tottenham, who have arguably the best back four in the Premier League, changed the whole back four and that always causes a problem. I felt really sorry for Wycombe that they did not get a replay - not just from a football point of view but also a financial point of view.

And finally, to the game of Saturday. If you've not watched the highlights from Tottenham v Wycombe, get stuck in.

A proper cup tie.

Trevor Sinclair
Ex-Man City & West Ham winger

The way Lincoln play, the patterns of movement, has been superb and they are flying in the National League. They are competing really well and deserve to win these games. It's the spirit of the team and they never looked in danger once they went ahead. They deserved the win.

Image source, Sunday Telegraph

To borrow the words of legendary commentator Barry Davies: "Look at his face! Just look at his face!"   

Theo Robinson shows just how much the FA Cup means to him and his Lincoln team-mates in this excellent picture on the back page of the Sunday Telegraph. What a result. 'The joy of the cup,' is the Telegraph's headline.

Danny Murphy
Former England midfielder on BBC Match of the Day

Where do you start? Liverpool were too narrow and picked a team that had nobody who could see a pass and open up a packed defence. It was so predictable and there was a real lack of quality with the ball. The team selection was wrong.

I think the strength in depth at Liverpool isn't there. A real test for Liverpool is coming up on Tuesday night because when your back is against the wall there is nothing better than a big game at Anfield under the lights.

Where do you stand on this whole 'respect the FA Cup' line? 

A lot of debate in the Sunday papers on the issue after Jurgen Klopp made wholesale changes in Liverpool's defeat to Wolves. Tottenham did the same, Watford have made seven amendments, so what's the correct way to do things?

Everyone wants a day out at Wembley don't they? Even if you do need to remortgage your house to afford a burger on Wembley Way.

Image source, Daily Star

The internet apparently 'exploded' because Danny Welbeck did this celebration after scoring his first goals since April last year in Arsenal's 5-0 win at Southampton yesterday.

It's Welbeck's impression of 'salt bae' - the first meme of 2017 after a video of a Turkish chef elegantly flicking salt off his elbow went viral.

Not familiar with it? Read more here.

Image source, .

Nothing like some mounted police outside the Lions Store.

It's building at The Den, people eating pie and chips way earlier than they should be on a Sunday. 

I'm going to briefly whizz you through Saturday's results and talking points, before we return.

Image source, Getty Images

Contrasting team news from The Den. 

Millwall boss Neil Harris names an unchanged starting line-up whereas Watford's Walter Mazzarri has made seven changes.

In come Costel Pantilimon, Adrian Mariappa, Brice Dja Djedje, Ben Watson, Adlene Guedioura, Brandon Mason and Jerome Sinclair for Heurelho Gomes, Sebastian Prodl, Christian Kabasele, Etienne Capoue, Tom Cleverley, Jose Holebas and Troy Deeney.

Adrian Mariappa is making his first Watford appearance since April 2012, having rejoined the club last summer.

Millwall starting XI: Archer, Cummings, Webster, Cooper, Craig, Onyedinma, Thompson, Williams, O'Brien, Gregory, Morison.

Subs: King, Romeo, Ferguson, Martin, Abdou, Worrall and Wallace.

Watford starting XI: Pantilimon, Mariappa, Kaboul, Britos; Djédjé, Doucouré, Watson, Guedioura, Mason; Okaka, Sinclair.

Subs: Gomes, Prodl, Cathcart, Janmaat, Capoue, Cleverley, Deeney.

Seven changes for Watford, are they running the risk of suffering the same fate Bournemouth did at The Den in the third round?

Image source, Getty Images

We've just talked about that Wigan FA Cup win, so it's timely that Watford's team has just dropped and Ben Watson starts for the first time since August. He must love this competition more than the FA themselves.

Watson is one of seven changes to the Watford side which drew 2-2 at Bournemouth. Millwall, 10th in League One, are unchanged from the draw at Bradford.

Image source, Getty Images

Wigan manager Warren Joyce tells a great tale about turning down the car he was given at the club because it was "too flash".

“We’re sponsored by Mercedes, and I said to the young lads, ‘I’m not bothered what car I’ve got’ and they were all laughing, saying, ‘Watch, you’ll be just as flash’. The next thing a big white Mercedes jeep arrives at my house. My son’s going, ‘That car’s sick’. I drove it the next day and thought, ‘There’s no way I can drive that’. I didn’t even park it in the manager’s spot. I said, ‘Get me a car that’s not flash, we’re bottom of the league’.”

With this in mind, what would you like to see your manager do to be more humble? Perhaps you think he needs to be more flash?

Tweet us on #bbcfacup.