You can bet Millwall will need little extra motivation as Watford come to town in front of the TV cameras this Sunday lunchtime.

The Den has always housed a raucous atmosphere and has become a fortress for Neil Harris' men this season.

Including their FA Cup third round scalp over Bournemouth, the Lions have won their last four games on home turf - and now they are prowling for another.

It is often a lose-lose situation for a Premier League team in this situation - with victory, and a route to the FA Cup fifth round, the minimum expectation.

And it could be far easier than against a Millwall side pushing for the League 1 play-offs only 10 weeks after looking in relegation danger at the end of October; seven games unbeaten, including four wins, have Harris' side firing on all cylinders ahead of Sunday's game.

One to watch for the hosts will be 28-year-old Lee Gregory, who was plucked out of non-league in 2014, and scored 20 goals in League 1 last season.

He is well on the way to repeating that tally, with 11 so far this year.

The Lions have little in the way of injury doubts either, with only Shaun Hutchinson and Harry Smith likely to miss out, and boss Harris is keen for his players to show the nation what they can do in front of the BBC TV cameras.

"It's an opportunity for my players to test themselves. This time we are playing one of the big Premier League boys on national TV," he told the club's website.

"I don't think my players will be under pressure because I have told them to go out and enjoy themselves. We are seeing this as a free hit and an opportunity to cause Watford some problems.

"The beauty of the Emirates FA Cup is we have a chance to cause an upset and that's why people from all over the country will be watching."