Result: Down beat Antrim 1-18 to 0-14
First Ulster SFC meeting between counties in 18 years
Down beaten by Tyrone in 2017 decider
Antrim last reached final in 2009
Down face Donegal or Derry in last four
Down 0-1 Antrim 0-2
The home side are on the scoreboard thanks to Caolan Mooney.
The wing-back surges through the heart of the Antrim defence before firing over the bar.
Down regain the kick out but Connaire Harrison's ambitious effort is wide.
Down 0-0 Antrim 0-2
Martin McHugh
BBC Sport NI pundit
Quote MessageI watched Antrim in the warm-ups and thought that they were really up for it. That's how it has transpired so far - they're full of running, are getting lots of tackles in and are working really hard.
Down 0-0 Antrim 0-2
That's brave from Niall McKeever as the Antrim midfielder goes down to claim a loose ball with boots flying around him and he earns a free for his side.
Paddy McBride converts a simple free.
Down 0-0 Antrim 0-1
Down win possession from the throw in but cannot register the opening score.
Instead, that honour goes to Antrim full-forward Matt Fitzpatrick with an excellent long-range effort.
Down v Antrim
John Haughey
BBC Sport NI at Pairc Esler
I would hazard a guess that there are 5,000 in Pairc Esler now. Not a bad turnout in the circumstances.
Down v Antrim
Ronan Millar's late inclusion in the starting team robs Down of some experience, which makes this game an even tougher contest to predict.
Antrim playing with a slight breeze in the first half.
Game on.
Down v Antrim
They may be neighbours but games between Down and Antrim are rare events.
These two sides have not played each other in the championship since 2011 when goals from Conor Laverty, Marty Clarke and Caolan Mooney saw Down advance to the fourth round of the qualifiers - where they lost to Cork in a repeat of the previous year's All-Ireland final.
It is 18 years since the Saffrons last won against their closest rivals – Shenny McQuillan kicked seven points in a 0-13 to 1-07 success at Casement Park.
Antrim will have to upset the odds if they are to progress to their first Ulster semi-final since 2014 – Down have won eight of the last 10 championship encounters between these two counties.
Down v Antrim
Martin Clarke
BBC Sport NI pundit
Quote MessageI think it may be a low scoring game. I think Down will win but I think it will be close. There has been a bit of apathy in Down of late, with some players opting out of the county squad, and some of that has maybe spread to the supporters.
Down v Antrim
Oisin McConville
BBC Sport NI pundit
Quote MessageIt is a very disappointing crowd. Both sides came onto the field to small rounds of applause, something akin to what you would find at a club league game. Players tend to up their game when there is a good atmosphere but the players will have to find motivation from inside themselves tonight.
Down v Antrim
John Haughey
BBC Sport NI at Pairc Esler
Those taking in tonight's Pairc Esler occasion include Chinese Consul General to Northern Ireland Madam Wang Shuying who looks to be thoroughly enjoying the occasion down below us in the 'royal box'.
Down v Antrim
Image source, BBC SportFormer Down forward Mark Poland retired from inter county football last year but he's back at Pairc Esler with his family to support his former team-mates
Down v Antrim
One late change to the Down side that was named earlier in the week as influential forward Ryan Johnston has been replaced by Ronan Millar at corner forward.
Castlewellan corner-back Colm Flanagan is the other newcomer for the Mournemen while goalkeeper Marc Reid is preferred to Shane Harrison.
Conor Poland, Aaron Morgan and Darragh O'Hanlon are all missing through injury.
Down: M Reid; C Flanagan, B McArdle, A Doherty; D O'Hagan, N McParland (capt), C Mooney; P Turley, N Donnelly; K McKernan, C Maginn, S Millar; D O'Hare, C Harrison, R Johnston.
Down v Antrim
Manager Lenny Harbinson established a settled side throughout the league campaign and all of his starting team today has previous championship experience.
In attack, the Murray brothers, Conor and Ryan, will join Matt Fitzpatrick as the main scoring threats.
Towering midfield pair Niall McKeever and Paddy McAleer will be key to the visitors’ chances.
Antrim: C Kerr; P Healy, P Gallagher, N Delargy; K O'Boyle (capt), R Johnston, J Laverty; P McAleer, N McKeever; M Sweeney, C Murray, R McCann; R Murray, M Fitzpatrick, P McBride.
Down v Antrim
Image source, BBC SportAntrim fans Maria McLarnen and Marie McKinley have brought a strong wardrobe game to Newry
Down v Antrim
John Haughey
BBC Sport NI at Pairc Esler
Just like last Saturday night in Enniskillen, it's a balmy evening in Newry.
There's a wee bit of breeze in the air but it's all bare arms in this natural amphitheatre of a venue with St Mary's graveyard to our right and the Drumalane Park estate overlooking us to our left.
The main stand is filling up nicely so it looks as if the GAA die-hards in both counties are doing their duty by turning up.
Down v Antrim
Image source, BBC SportAntrim supporters Sean Kelly, Gavin Murray and Mark Duffin are hoping to see their county claim a first Ulster SFC win in four years
Down v Antrim
Down have won a thriller in the curtain-raiser as they earned a 4-15 to 3-13 win over a game Antrim side in the Ulster Under-20 Championship quarter-finals.
All of Down's scores came from play which is a remarkable stat.
There will be a report of that game from our correspondent on the BBC Sport NI website shortly.
Down v Antrim
Do not let the small matter of the Champions League final distract you from all the action at Pairc Esler this evening.
I have been reliably informed that listeners to our coverage on BBC Radio Ulster MW will be kept up to speed on all the major events in Kiev this evening so you won’t miss a thing if you choose to listen via the link on this page.
There is also full coverage on the BBC iPlayer with Martin McHugh, Oisin McConville and Martin Clarke providing expert analysis.
Down v Antrim
Down manager Eamonn Burns says he expects Antrim to provide formidable opposition for the Mournemen.
Ulster SFC: Down boss Burns relishing test against Antrim
Down v Antrim
Antrim assistant manager Brendan Trainor says the Saffrons will pose a stiff challenge to Down in Newry.
Antrim not there to make up numbers - Trainor