The League One club take the lead following a swift counter-attack. Midfielder Louis Reed feeds a through-ball to Marc McNulty, and the club's top scorer this season notches his ninth of the campaign from 10 yards out.

Image source, PA

Image source, AP

Sunderland grab the opener through Patrick van Aanholt's drilled low shot from 15 yards.

Just need Costel Pantilimon to make a late wonder save and 1973 is fully rewound.

Tick this one off your third-round bingo card.

At least five fans have clambered up a couple of trees overlooking the Crabble to get a free view of the action.

We're all about goals today - and you can watch Scott Dann's effort for Palace now by using the highlights tab at the top of the page.

QPR seem to have weathered a strong start from Sheffield United, getting their foot on the ball.

But the Blades are defending pretty tidily, packing two solid lines across the edge of the penalty box.

Sunderland are knocking on the door, in the hope of finding an opening goal and Leeds clear the ball off the line through Casper Sloth after a header from a corner.

Image source, opta

Dover have found it tough going in the opening 25 minutes. You could throw a picnic blanket over their whole side as striker Stefan Payne finds himself increasingly isolated - as this map of their average positions shows.

Steve Claridge
BBC Radio 5 live at the Crabble

"This is a much better game. Palace blew Dover away in the first 10 minutes but Dover have now settled. It was difficult to see anything other than a landslide victory earlier, but Dover are tougher to break down and are not as open as they were."

Dover fans scream for a penalty, but it would have been a shocking decision if the referee had agreed.

A cross from Liam Bellamy slams straight into Martin Kelly's face from not much more than point-blank range.

A bizarre moment at the Stadium of Light as Jordi Gomez tries to take a quick corner for Sunderland, but only succeeds in kicking the flag out of the ground.

Sheffield United are coming into it at Loftus Road with QPR's three-man central defence of Rio Ferdinand, Karl Henry and Steven Caulker unsettled by Marc McNulty's running.

The Sheffield United striker's nip to the near post almost gets him in, with a late sliding block diverting his shot behind.

Injured Leeds defender Stephen Warnock:, external Strong Sunderland team but got to believe an upset can be on the cards!

Aidan Williams:, external You would think QPR vs Sheff Utd and Sunderland vs Leeds are the safer bets for an upset, especially the former.

Asher Nutting:, external Reckon Leeds and Sheffield United will both get something from their games today whether it's a win or a replay

Adam:, external It's time for QPR's annual 90 minute #FACup run!

Steven Fletcher is unable to keep his effort inside the six-yard box down to open the scoring for Sunderland after a neat cross from Patrick van Aanholt on the left. He stretches out a right foot, but the ball goes safely over for Leeds.

Dover have got a bit of breathing space after Palace blew them out of the water in the first 10 minutes.

They have got a bit of possession, but even Spain circa 2008 would struggle to keep it on this cabbage patch of a pitch.

Dan in London: If Dover continue to play stereotypical non-league "kick and rush" and don't mark anyone then this will be a cricket score.

Dan in Lancaster: I bet Dover and Newcastle are now twin cities.

The first attempt on goal from Sheffield United comes from midfielder Stefan Sougall. He gets a little underneath it though and clears the crossbar with Alex McCarthy unconcerned in the QPR goal.

Dean Kiely
BBC Radio 5 live sports extra summariser

"It's been a cagey start so far as both teams try to feel each other out but you would expect as this game goes on that if Sunderland can take control in the middle through Jack Rodwell and Liam Bridcutt then it could be a long afternoon for Leeds. But it is certainly more like a game of chess at the moment than a rip-roaring cup tie."

Listen to full 90 minute commentary on BBC Radio 5 live sports extra

There has not been a lot to get those travelling Blades excited so far with the hosts keeping the ball and probing away intelligently.

Image source, Getty Images

Image source, @sufc_tweets

Sheffield United: Around 2,700 Blades fan inside Loftus Road this afternoon.