Manchester United midfielder Marouane Fellaini: "We knew it would be very hard but we win today and that's the most important. We changed the game, we know the quality of Ashley Young, he can cross and it was an important substitution.

"I like to play forward, I can score goals but the manager is the boss."

Phil Neville
Former Manchester United defender at Deepdale on BBC One

"They keep showing great spirit. Louis van Gaal made changes and it won them the game. It's a massive tie in the next round and they are building a bit of momentum now."

One defeat in 19 games for Louis van Gaal's Manchester United side now. With all of the money they have spent, and the star players they have brought in, you'd expect no less. But they still don't convince do they? It's a mismash of a squad if you ask me.

BBC Radio 5 live

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Is time running out for Radamel Falcao at Manchester United? And is Louis van Gaal a footballing genius or do his tactics prove he's a little bit desperate? Are supporters running out of patience with their manager?

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Sandipan in London: Against Burnley and now against Preston, the moment we switched to 4-4-2 with two wide players, our whole outlook changed. We started creating chances, breaking down the opposition down, and became menacing, organised and purposeful in attack. What a turnaround now. All we need is Louis van Gaal to realise this (happened twice now) and stick with this set up and formation! No more arguments, this is it! Ander Herrera blossoms in the middle alongside Daley Blind too.

All over. Preston are out and Manchester United go on to face Arsenal in the last eight.

Huge applause around Deepdale for the home side's efforts.

Preston win a corner - is that in?! Scott Laird flicks it on, David De Gea makes a save and Ashley Young clears from off the line! Good defending from Young.

Martin Keown
Former Arsenal defender at Deepdale on BBC One

"I know Manchester United have won this but Louis van Gaal is taking too long to find out his best system and the right personnel on the pitch in games. The top managers see these things much sooner."

FOUR MINUTES added on. A dodgy offside call and a dodgy penalty call will be the talking points after the game.

That's a kick in the teeth for the home fans. Or perhaps somewhere more painful. Preston have given their all but Manchester United have played well for about 15 minutes in total, and that has been enough.

Martin Keown
Former Arsenal defender at Deepdale on BBC One

Image source, Empics

"The goalkeeper has come from a long way back and is nowhere near it. Once he goes down Phil Dowd has no choice but to give that. The penalty was emphatic from Wayne Rooney - he knows what he wants to do and no goalkeeper is saving that."

Image source, PA

Wayne Rooney has a goal in 2015 - it's his first of the year and he buries it. Right into the roof of the net.

That settles it. United will face Arsenal in the quarter-finals.

Image source, Getty Images

Wayne Rooney chases a ball through, Preston keeper Thorsten Stuckmann comes out and tackles him - Rooney goes down and a penalty is given. I don't think there is any contact...

The away fans are singing about Wembley again as Preston send centre-half Tom Clarke up front for the final few minutes. A cash-spinning replay for Preston? They need to fashion one chance...

Martin Keown
Former Arsenal defender at Deepdale on BBC One

"Robinson needed to run with it against the Manchester United defence. He just shot too soon there."

Manchester United right-back Antonio Valencia gives the ball straight to Preston sub Callum Robinson, he has time but tries a shot from way out, hitting it right at David De Gea. Unlike for the opening goal of the night, De Gea stops it.

Chris Waddle
Former Tottenham and Newcastle winger on BBC Radio 5 live

"Manchester United have actually lost a bit of composure in the past few minutes. There's still hope for Preston here in the remainder of the game."

Into the last 10 minutes of a disjointed, disappointing display from Manchester United - but they are close to a place in the last eight. What will the results from this post-mortem reveal?

Ashley Wilkinson:, external Wonder, if United win this, it'll be considered a deserved, hard-earned win like at West Ham by Louis van Gaal. Again, far from good enough.

Chris Edwards:, external Wing play gets a goal, almost like they should have been doing this since the start the fans have been crying out for it for weeks.

Andy Donley:, external This, Mr Van Gaal, is why Manchester United play with wingers. Cotton on!

Martin Keown has picked his three contenders for the FA Man of the Match, but who gets your vote?

Have your say on the right-hand side of this page, or via the vote tab at the top if you're on your phone or tablet.