Wigan face an almighty task when they visit Manchester United at Old Trafford on Sunday. The Latics travel to one of the form sides in the Premier League and one that is enjoying life again under new manager Jose Mourinho. Old Trafford has become a fortress to be feared again.

Still, the FA Cup is for believing and that belief will make sure that fear isn't a so much of an issue when Warren Joyce's men make the short trip across to Manchester.

Wigan are struggling in the Championship but have nothing to lose when they face Mourinho's men and that could be liberating experience for the Latics. How often have we seen teams struggling for league form produce a bit of magic in the cup?

Manchester United will rightly be confident of progressing to the Fifth Round but there are opportunities for Wigan success on Sunday. Can they do the unthinkable and take a draw, or a win, home with them?

Here are THREE things that could be a sign Wigan will make dreams reality this weekend...

Goalscoring Latics

Will Grigg may not be on fire this season but Wigan's recent form is actually very good. They're on a three-game winning run this January and have scored two goals in each of those matches. That's goalscoring potential that must give them hope of sticking away at least one chance at Old Trafford on Sunday.

Grigg has struggled for goals this term but he did produce some FA Cup magic in the last round, netting in a 2-0 win over Nottingham Forest. The latter was just his seventh goal in all competitions but shows that there's life in the striker on his day.

Last season's 27-goal man will know that a trip to Manchester United represents a brilliant chance for him to hit the headlines again.

Joyce knows Man United better than most

Warren Joyce knows Manchester United better than most opposition managers the Red Devils will face this season.

Joyce was part of the Old Trafford furniture before becoming Wigan boss, in charge of overseeing young United stars transitioning into the first-team as Reserve boss.

Paul Pogba, Jesse Lingard and Marcus Rashford have all been guided by the Latics gaffer over the years and he'll have the inside scoop on how to counter their abilities should they play on Sunday.

That's an invaluable insight on some of United's potential match-winners and if Joyce can successfully stop some of their big stars performing then Wigan might be able to just sneak a result.

Wigan fans will be hoping that knowledge will give their side the edge they need.

Wigan love a Cup run

Wigan have produced an almighty FA Cup shock in recent years, famously lifting the trophy at Manchester City's expense at Wembley in 2013.

The next year they went far in the competition, too, reaching another Wembley tie in the semi-final before being knocked out by Arsenal cruelly on penalties.

That recent history should be an inspiration for the Latics, despite going out early in the competition in the two seasons prior this.

This is the first time they've reached the Fourth Round since those Wembley memories and their fans will be dreaming of another incredible cup run.

Can they turn those dreams into reality on Sunday?