Postpublished at 16:47 Greenwich Mean Time 3 January 2015
A minimum of three minutes of injury time at the King Power as Newcastle scratch around for a leveller.
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Seventh-tier Blyth led 2-0 at half-time
Derby deny Southport in last minute
West Brom score seven against Gateshead
Watch goals here from 17:15 GMT
BBC Sport
A minimum of three minutes of injury time at the King Power as Newcastle scratch around for a leveller.
Derby boss Steve McClaren is sipping a cup of tea on the sidelines as his team continue to probe for a winner. But he might need something stronger.
Conference strugglers Southport have all 11 yellow shirts back in their box as the clock ticks towards a replay.
BBC Final Score
Reporter Ivan Gaskell: "There's 88 places between these two sides in the football pyramid and now there's just two minutes to the final whistle.
"Southport have put in an immense performance this afternoon."
Former Tottenham manager David Pleat
at Hawthorns for BBC Radio 5 live sports extra
"Chris Brunt hits the post, using his weaker foot. Bartlett, the Gateshead goalkeeper, was struggling, and he'll be feeling sorry for himself today but I don't think he had much of a chance of stopping any of West Brom's goals. And hopefully in retrospect he'll realise he enjoyed this experience.
"Quite clearly, Gateshead's efforts from the first half are chickens coming home to roost, because many of their players look out on their feet."
Still no goals at the Cottage. This one's been heading for a replay since it kicked off.
Amy Hughes-Dennis: Whatever Rowett said at half time has worked! Come on you bluesssss!
Tom Ikin: Get in!! 4th round here we come!! @pnefc
Blyth still going. They have the ball in the corner but can't force a corner. Goal-kick.
If Charlton are to level against Championship rivals Blackburn then they must do so with a numerical disadvantage. Addicks midfielder Yoni Buyens sees red for a second bookable offence.
Plenty at stake now and Rochdale defender Ashley Eastham makes a fine block to deny Forest a decent opportunity.
Leicester almost secure Newcastle's scalp as Wes Morgan's header deflects off Mike Williamson and against the Magpies bar.
Leicester deserve a spot in the fourth round having created the better chances so far. Four to go.
We have had some great games today, especially at The Den, where Ricardo Fuller has pulled Millwall level with only seven minutes left. Fuller converts after good work from Lions substitute Magaye Gueye.
The replay will take place at the Coral Windows Stadium on Wednesday, 14 January if neither side can find a winner.
BBC Final Score
Pundit Steve Claridge: "Preston manager Simon Grayson has always had forwards at the club who can grind teams down and that's what Paul Gallagher has done today.
"Norwich have been a real let down though this afternoon and just not put in any sort of performance."
Derby could fire a cannonball at Southport's teenage keeper David Raya Martin and he would still probably save it. The Blackburn loanee is certainly putting himself in the shop window, saving again from Spanish compatriot Omar Mascarell as Derby continue to press. Little over five minutes left....
Another one for your FA Cup cliche bingo - man down with cramp. Extensive treatment.
It's like basketball at Prenton Park as both sides seemingly go up either end and score. This time it's Swansea's turn as Wayne Routledge, cutting from the right, clips the ball past the keeper from inside the penalty area.
Rochdale have been pegged back in the second half but they are beginning to boss the ball again as Forest perhaps run out of steam. Shock still very much on.
BBC Radio 5 live
Southport striker Richard Brodie, speaking to BBC Radio 5 live in the dugout after being substituted: "Our teenage keeper David Raya Martin is brilliant - he has got a great career ahead of him.
"It is so different to a Conference game out there. But the adrenaline is keeping us going, we're still digging in and we will keep going and doing what we have done."
Championship Norwich City are heading out of the FA Cup at the hands of League One Preston. Paul Gallagher is the hero at the moment for Simon Grayson's side. Gallagher gets his second goal of the match, slotting home unmarked from Kyel Reid's left-wing cross.
BBC Final Score
Pundit John Hartson: "Definitely the performance of the day so far from Southport.
"Derby have had more efforts on goal, but they haven't been able to find a way through. Southport are just going to have to keep going if they're going to pull off the result of a lifetime."
Into the final 10 minutes...