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By Martin Conaghan & Thomas McGuigan
1710: So, Falkirk join St Mirren in the semi-finals of the Scottish Cup. Dunfermline and Aberdeen have to do it all again in a replay at Pittodrie; while Rangers host Hamilton Accies on Sunday.
You reckoned Aberdeen's Sone Aluko (8.00) was the star performer at East End Park, while Inverness defender Pavels Mihadjuks (8.50) was top of the tree at the Caledonian Stadium.
Thanks again for your company today. You can catch the highlights of today's Scottish Cup ties at 2250 GMT on BBC One Scotland.
Cheers!
1704: "The referee gets 0 out of 10 at the Caley game. A total and utter shambles."A caleyjag, via text
1657: "Oh, dear. I hate to say it - but I knew this was going to happen. Our defensive frailties have been on show for all to see this season. All the Pars needed to do was ask a few questions of us." ChillScot on My Sport
1653: FULL-TIME
Inverness 0-1 Falkirk
Falkirk survive a late Inverness onslaught to book their place in the last four of the Scottish Cup. The Bairns were the team of the fifth-round and ensure their name is in the hat for the semi-finals.
Some welcome relief for manager John Hughes, who has seen Inverness leapfrog his side to leave them bottom of the table.
1652: Inverness midfielder Dougie Imrie sends a superb 20-yard shot towards goal, but he is denied by the brilliant Danny Mallo.
1651: FULL-TIME
Dunfermline 1-1 Aberdeen
The Pars are rewarded for a spirited fightback after falling behind to Sone Aluko's opener. A replay at Pittodrie beckons...
1650: Aberdeen manager Jimmy Calderwood still looks as though he could be doing with closing his eyes and listening to a pan-pipes CD. He's not a happy camper...
1648: Three minutes of injury-time at East End Park.
1645: 10-man Inverness force a corner at the Caledonian Stadium, but Danny Mallo confidently punches the ball clear.
1644: Jamie Smith's shot is cleared for an Aberdeen corner... but Lee Mair's shot is blocked and the Dons can't profit.
1641: A foaming Aberdeen manager Jimmy Calderwood looks fit to pop on the touchline after watching his side concede that equaliser.
Think of Michael Douglas in the film Falling Down and you're getting close to the eye-watering frustration currently being felt by the Dons boss.
1639: GOAL
Dunfermline 1-1 Aberdeen
Nicky Phinn scrambles the ball over the line from close-range for an unexpected Dunfermline equaliser after Jamie Langfield makes an initial block from Jamie Mole's shot. Game on!
1637: Aberdeen winger Sone Aluko lights up proceedings at East End Park with a mazy run that fairly bamboozles the Pars defenders, but his team-mates can't profit from some fancy footwork.
Quality stuff!
1636: "I don't know how I feel about Jamie Mole scoring. On the one hand, he's on loan from Hearts so I want him to do well, and also would like Aberdeen out the cup. On the other hand, if he can score for Dunfermline, how come he was so useless in front of goal in maroon?" GlasgowJambo1987 is vexed over on My Sport.
1635: Just over 20 minutes remaining at East End Park and the Caledonian Stadium. As things stand, Aberdeen and Falkirk will be joining St Mirren in the last four of the Scottish Cup.
1630: Falkirk goalkeeper Danny Mallo gives manager John Hughes palpitations when he comes to claim a cross, but grabs for the ball like trying to get hold of a trout leaping from a waterfall.
The ball is eventually launched to safety. Silky stuff!
1628: "Is one goal going to be enough today? I doubt it - here's hoping the Dons don't decide to try to defend this slender lead." ChillScot
Dunfermline have responded well to going a goal behind and it's end-to-end stuff at the moment!
1626: Inverness midfielder Russell Duncan gets another glimpse of goal but sends his 18-yard shot high and wide.
1624: Falkirk defender Steven Pressley dusts himself down after challenging for a high ball with about six other players.
He took a stray arm flush on the coupon and looks a bit dazed by it all.
1623: Dunfermline's Nicky Phinn's header is tipped wide by Jamie Langfield. The Pars have come roaring back at East End Park as they look for an equaliser.
1620: "I'm doing my bit for the Scottish game: rather than staying inside listening to the football, I went down to the park for a kick-about. An example to all the kids out there, to get up and play the game, and get fit into the bargain." GlasgowJambo1987
I'm delighted you decided to get out there to strut your stuff GlasgowJambo, but surely you should've waited until our breathless and comprehensive Scottish Cup coverage was done and dusted!
Are you sitting comfortably; with full-time orange in hand? My Sport.
1618: GOAL
Dunfermline 0-1 Aberdeen
Sone Aluko fires Aberdeen in front with a crisp low drive beyond Paul Gallacher from just inside the area. No less than what the Dons deserve for their impressive second half display.
1614: There's a stramash at the Caledonian Stadium. Russell Duncan goes down clutching his face after clashing with Falkirk captain Darren Barr.
Not much in that there, perhaps a broken nail?
Yellow card for Duncan and a yellow for Barr too. Blood and thunder cup tie at the Caledonian Stadium.
"Much ado about nothing; with 16 players getting involved." BBC Radio Scotland pundit John Robertson
1612: Jamie Smith's cross causes chaos in the Dunfermline six-yard box but the home side do enough to put Tommy Wright off as his tame header lands in the arms of Paul Gallacher.
1611: Inverness midfielder Russell Duncan sends a shot over Dani Mallo and clear over the bar. What a great chance for the equaliser!
1610: Dunfermline manager Jim McIntyre urges his troops to push up as Aberdeen look increasingly menacing as the second half wears on.
Still goalless at East End Park, but the Dons are beginning to turn the screw.
1608: Remember, you can vote for your man of the match at East End Park and the Caledonian Stadium using our Player rater
1607: Aluko works the space to get in a shot but on this occasion it is Greg Shields who blocks the Aberdeen player's effort.
1606: Falkirk's Patrick Cregg blazes over the bar from just inside the penalty area. What a shocker! He should have doubled the Bairns's lead there.
1605: We're up and running again at the Caledonian Stadium.
1602: The second half gets under way at East End Park.
1552: "Let's hope we can squeeze another Scottish Cup shock out of Saturday!" 2o-DeMoN-o9 on My Sport
Terry Butcher's side were looking in control until they conceded that penalty.
1546: Aberdeen midfielder Jamie Smith embarks on a mazy run - not unlike John Barnes's for England against Brazil in the Maracana in 1984 - but he lacks the composure of the former Liverpool maestro and blazes his shot over the bar.
HALF-TIMEat East End Park and it's still goalless.
1543: Charlie Mulgrew's curling free-kick is saved by the out-stretched arm of Paul Gallacher.
1541: Having got blood on his shirt after cutting his mouth, Dunfermline striker Graham Bayne is having to change his top , which does not have a number on the back.
1540: "I don't have a good feeling about today. I understand why Jimmy has made the changes but Duff at right-back seems a bit too much of a gamble." Chillscot is a concerned Dons fan on My Sport.
1538: Falkirk's veteran defender Steven Pressley goes into referee Steve Conroy's book for persistent fouling.
1534: Sone Aluko's goal-bound effort is cleared yards from the line by Dunfermline captain Scott Wilson. Still goalless at a wind-swept East End Park.
1531: GOAL
Inverness CT 0-1 Falkirk
Falkirk's Carl Finnigan fires the visitors in front from the penalty spot - his first goal of the season.
1530: PENALTY TO FALKIRK
Lionel Djebi-Zadi pulls down Carl Finnigan inside the box after grabbing a handful of the forward's shirt and the referee points to the spot.
The defender brushes himself down, but is sent-off by Steve Conroy.
1528: Over on BBC Radio Scotland's Open All Mics, pundit John Robertson lets out a yelp as though he's caught his foot in a bear trap.
Unfortunately, he's not about to tell us about a goal. Rather, he's talking about the merits of scones & jam - making my belly rumble into the bargain...
1526: Jamie Mole's cross drops on to the head of Dunfermline's Graham Bayne but the striker's effort goes narrowly wide.
It's very quiet over on My Sport. Is there anyone still there? Give me some of your chat and let rip here.
1523: Dani Mallo is at full stretch to keep out a long-range, looping header from Ross Tokely.
1517: Inverness midfielder Ian Black tries his luck from 20 yards but Falkirk goalkeeper Dani Mallo gets down smartly to push away the shot.
Mallo's a corker of a name - conjures up images of him enjoying a milkshake, burger and fries with The Fonz in the comfy Al's Diner in Happy Days.
1516: Dunfermline's Nicky Phinn smacks in a volley from a corner but the midfielder cannot keep the ball down as it careers into the stand.
1515: Still goalless at both this afternoon's cup ties. The four goalkeepers are quieter than a group of church mice halfway through a sponsored silence.
1514: Apologies for the streaming problems we're experiencing with the game at East End Park. Stay with us, as we're doing all we can to fix it!
1513: "One or two players are really having problems with the wind."BBC Radio Scotland pundit Craig Paterson at East End Park
1512: "Been listening to the St.Mirren v Celtic game on Radio Scotland here in North Wales (helluva crackly reception). Fantastic Saints! Smashin' commentary fae the Radio Scotland team in the grun'! - See ye at Hampden!"'Aul' Saint' in North Wales, via text on 80295.
1511: "It's been a stodgy opening ten minutes,"the normally ebullient Sportscene commentator Liam McLeod sounds decidedly underwhelmed at the Caledonian Stadium.
1509: Dunfermline's Callum Woods almost puts his side in bother with a sliced clearance from Sone Aluko's corner, which drifts narrowly wide.
1508: Aberdeen have started strongly against the Pars. Dons striker Tommy Wright embarks on a Donkey Kong-style run, scattering any Dunfermline defenders in his path, but he can't apply the finish.
1505: It seems that Paisley is not the only place where the wind is determined to play havoc with the football with a strong breeze blowing at Dunfermline's East End Park.
If anyone is wearing a wig they better staple it down or hold onto their hats...
1504: Falkirk captain Darren Barr requires the magic sponge treatment after being whacked by Richie Foran.
1503: "Aberdeen have won at least one trophy every decade since the 1960s. If JC fails to bring a trophy to Pittodrie this season, he'll be the first for more than 40 years. No pressure then."Davy, Aberdeenshire, via text.
1500: We're under way at East End Park and the Caledonian Stadium.
1455: The Ghostbusters theme tune is blasting out at the Caledonian Stadium. Let's hope for a ghoul-fest between the SPL clubs. Ouch!
1445: "Well done the Buddies, it was a great team effort to hold out for the win. Celtic couldn't create many chances and they didn't have the cutting edge needed to capitalise on the chances they did create." QatarBhoy
St Mirren must be delighted with their cup win after last week's mauling at Celtic Park. Do Buddies fans think they can go all the way and win the cup? My Sport.
1440: Time for some juicy statistics on this afternoon's two cup ties...
The meeting of Inverness CT and Falkirk brings together the Scottish Premier League's basement clubs.
The Bairns currently prop up the division with Inverness sitting 11th. But this is the cup and the pressure is off both clubs as they look to reach the last four.
Today Dunfermline - the only non-SPL team in the last eight - welcome former manager Jimmy Calderwood back to his old stomping ground.
Calderwood's Aberdeen have yet to reach a major cup final with the Dons boss having been in charge of Dunfermline for their 2004 cup final appearance. The Dons have won the tournament seven times.
1435: Thanks Martin, good afternoon everyone. Well, who said the romance of the cup was dead? Try telling that to the St Mirren fans dancing out of the stadium at full-time this afternoon!
1430: Okay folks, that's all from me for today. Thanks for all your texts and messages on My Sport. I'm going to hand you over to Thomas McGuigan for the rest of the afternoon as we gear up for Dunfermline v Aberdeen and Inverness Caledonian Thistle v Falkirk.
1427: "We dug in when we had to dig in and defended properly. I credit them all, but mostly Chris Smith." St Mirren manager Gus MacPherson speaking to BBC Scotland's Chris McLaughlin after the final whistle.
1424: What a start to the day. What can we expect next? Dunfermline to beat Aberdeen? Fulham to beat Manchester United?
1420: "Congratulations St Mirren, deserved payback for last week, and on the bright side I'd rather the Bhoys dropped out of the cup rather than drop points in the league." QatarBhoy on My Sport
1416: You can almost see the grin on the face of BBC Scotland's Chick Young through the radio as he praises Gus MacPherson's side for responding so emphatically to last week's hammering at Celtic Park.
1414: I think I need to go and have a lie down in a dark cupboard with one of those soothing gel-filled eye masks. And people say the Scottish Cup has lost its appeal. Tell that to the St Mirren fans signing their hearts out in Paisley. My good man Thomas McGuigan is limbering up on the sidelines to take you through the rest of the afternoon.
1412: "Now for Accies to beat Rangers, and this cup competition will become interesting..." neish1875 on My Sport.
1411: "It's absolutely brilliant. We're at Hampden now. We're just looking forward to." St Mirren striker Billy Mehmet speaks to BBC Scotland's Chris McLaughlin at the final whistle.
1410: "Pandemonium at the new St Mirren Park." BBC Radio Scotland commentator David Begg at the final whistle
1409: The St Mirren fans go wild as they deservedly pick up their first win against Celtic since 1990 and book their place in the last four of the Homecoming Scottish Cup.
. Get in there before the end of the match and rate today's performances.
1406: Gary Caldwell takes a pop with a long-range shot down the middle, but Smith collects and time starts to run down for Celtic.
1405: Three added minutes of time at St Mirren Park as the fourth official raises the board.
1404: "That was an absolute sitter of a chance. He should have done more." BBC Radio Scotland commentator David Begg on Jan Vennegoor of Hesselink's header straight into the arms of Chris Smith.
1403: Celtic have rescued a game in the last five minutes 16 times since Gordon Strachan became manager. Can they make it 17 and stay in the cup?
1402: The clock is ticking for Celtic as we enter the last few minutes of the match. Nervous stuff as the visitors pile on the pressure with a Nakamura corner that Vennegoor of Hesselink heads straight at keeper Chris Smith.
1401: Craig Dargo fires in a shot from out on the right-hand side of the Celtic penalty area, but it lacks power and Artur Boruc easily saves to spark a Celtic counter-attack that eventually fizzles out.
1400: "It's all hands to the pump at the back." BBC Radio Scotland commentator David Begg on St Mirren's defending
1359: Don't forget folks, if your nerves can handle it, you can catch the highlights of this match tonight on BBC ONE Scotland at 2250 GMT.
1358: Darren O'Dea makes way for Ryan Conroy as the Celtic manager Gordon Strachan steps up the game a little in an attempt to salvage something from the tie.
1356: Andy Dorman goes one-on-one with Artur Boruc to extend St Mirren's lead, but the Polish keeper manages to block. However, the ball only goes as far as Craig Dargo before Darren O'Dea makes a quality challenge and clears the danger for Celtic. Exciting stuff.
1355: "They're going deeper and deeper and deeper and that could be deep into trouble." BBC Radio Scotland commentator David Begg on how St Mirren are being hemmed in by Celtic
1354: Celtic have 10 minutes left to get back into this match, and there's a real sense of desperation about their play now.
1348: "Jack Ross is playing like a giant for the men in black and white." BBC Radio commentator David Begg
1348: Marc Crosas makes way for Georgios Samaras. Looks like Beggy and Doddsy got it wrong.
1347: A mistake by Andreas Hinkel after a Garry Brady corner almost costs Celtic another goal. Craig Dargo then fires in before Marc Crosas leaps off the line and clears the ball to save the German's blushes.
1345: Nakamura fires in a trademark free-kick and television evidence shows Jan Vennegoor of Hesselink attempting a slam-dunk with his right hand. The Celtic players scream for a penalty and the referee stood in a bit of a daze for five seconds while he made up his mind what to do. In the end, he handed St Mirren a free-kick against big Jan. Drama over for another few minutes.
1344: Celtic are really piling on the pressure. St Mirren have their back to the wall and they're going to find it difficult to hold out for the last 20 minutes at this pace.
1342: "My wish looks like it might come true, now for the Euromillions, only one wish left now." arabest89on My Sport.
Forget it arabest89, I'm counting on that Euromillions money.
1341: The BBC commentary team of Billy Dodds and David Begg reckon Jan Venegoor of Hesselink will be the man to come off when Samaras comes on. The big Dutchman has failed to make an impact on the match.
1340: A bit of head-tennis in the St Mirren penalty area there, but Chris Smith gathers and the home fans breathe a sigh of relief.
1339: Georgios Samaras is warming up on the sidelines for Celtic. Gordon Strachan looks like he's going to mix things up early in the search for a goal.
1338: "And that is why McManus should NEVER be the Celtic captain, simply not good enough." Strong words from EmmDee57 on My Sport.
1334: "Celtic need all their character. They'll never give up." BBC Radio Scotland pundit Billy Dodds
1333: St Mirren have a spring in their step now, but Celtic have a sense of urgency about their play. Nakamura blasts in a threatening free-kick from 25-yards out, but the Buddies sweep it clear and the danger subsides.
1331: "GET IN THERE BILLY MEHMET!!!!!!!!!! WOO HOO!" DavidAttenborough abandons his Theory of Evolution to celebrate St Mirren's opener on My Sport.
1329: Goal! St Mirren 1-0 Celtic. Billy Mehmet blasts in past Artur Boruc as the Polish keeper dives the wrong way. St Mirren Park erupts.
1328: Penalty at St Mirren Park. Stephen McManus brings down Craig Dargo but escapes a red card. Yellow for the Celtic captain to boos of derision from the home fans.
1327: Gordon Strachan cuts a lonely figure in the visitors' dugout with a face like fizz. Stick a helmet on his nut and he could play a shrunken version of Judge Dredd with a look like that.
1326: "Very frustrating game. Could well be a replay. But then, this is Celtic playing here!" From Martin, North Stand, New St Mirren Park via text on 80295.
1325: Mcgeady fires in an angled shot from the edge of the D, but it inches past Chris Smith's left-hand post. Good effort there by the Celtic winger, but just off-target.
1322: "The swirling wind, the new pitch - it's difficult conditions for the players and it makes it tricky to connect a pass, but I'm still quite pleased with the pace of the game here. It's a cracker." BBC Scotland pundit Billy Dodds chips in with his views on the weather conditions at St Mirren Park
1321: "St Mirren will feel they can nick this now, I mean the longer the game goes the more confident they will get." followfollow1972 on My Sport.
1319: And we're back off for the second half of St Mirren v Celtic.
1316: Don't forget folks, we have coverage of Dunfermline v Aberdeen and Inverness v Falkirk at 1500 GMT. You can listen to both of those matches on Radio Scotland 810MW and 92-95FM, or you can listen here online and keep up with the live text here. We're also doing our Open all Mics feature as well. There really is no other place to be on a Saturday afternoon.
1311: Re: 1258 "Anonymous must have some of that tartan paint!" Billy, Glasgow, via text on 80295
1312: BBC Scotland's Chick Young starts one of those philosophical debates that has troubled the greatest football minds since the days of Socrates and Plato: would you take winning the Cup if it meant relegation from the SPL? Well, what would you take? Send us your views at My Sport or via text on 80295
1309: BBC Scotland pundit Craig Paterson is at East End Park and he says it's freezing. It's two hours before kick-off and the Dons fans are arriving in Dunfermline in their droves.
1305: "In terms of chances, not great viewing, but I'm loving the pace of this game - it's frantic, 100 miles per hour. It's a classic cup tie." BBC Scotland pundit Billy Dodds.
1302: Half-time: St Mirren 0-0 Celtic.
1301: We're edging closer to half-time and still no scoring. The earlier, furious pace has given way to a more pedestrian, passing game. I'd say it's honours-even so far in this match, not much between the two sides.
1300: "St Mirren have been playing beautiful football this season but have been shy in front of goal. We can win today and reach top six if the strikers and Dorman perform." Alex Robertson, Toronto, via text on 80295.
Wow. A text all that way across the Atlantic ocean to Sportsound. We hope you've got a cheap rate on international SMS messages, Alex?
1258: "This is rubbish. It's like watchin paint dry." Anonymous text, via 80295. Thanks for that anonymous. Surely it's not that bad?
1255: It's become a battle of wits in the midfield at St Mirren Park. The Buddies are playing it tough and stifling out every Celtic attack. Gordon Strachan's men are having to constantly track back to cope with the threat of Jack Ross down the right. What this game needs is a goal, to coin a well-worn football phrase.
1253: "I hope Naka doesn't leave, we'll miss him if he goes. A lot of fans don't think he does much in games but without him we'll be a much weaker side." EmmDee57. Have your say on My Sport.
1250: St Mirren's Jack Ross concedes a free-kick out on the left after Aiden McGeady had attempted to weave into the box. The former Falkirk man ended up in a tangle of limbs with the Irish international, but it was fairly innocuous stuff. Celtic fail to capitalise on the resulting free-kick.
1248: "I don't think any goalkeeper wants to come out their six-yard box today." BBC Radio Scotland commentator David Begg continues to assess the windy conditions at St Mirren Park.
We should get David Begg a job swap with Heather the Weather or Gail McGrane.
1247: Andy Dorman blasts a 22-yard free-kick against the Celtic wall from what our top commentator David Begg described as being "Nakamura territory". Actually it was more like Joe Tortalano territory by the time he had finished with it.
1246: Celtic's Aiden McGeady fires in a cross-cum-shot from the edge of the box, but Chris Smith confidently collects. The St Mirren keeper looks like he's been working hard on the training ground this week to improve his chances of hanging on to a first team slot.
1242: "This looks like being a really tight contest." BBC Radio Scotland commentator David Begg
Beggie also just mentioned the "St Mirren Park" swirl. We're not too sure what he's talking about, but we think it has something to do with the unique architectural structure of Paisley's newest landmark and how the wind is affected by the design.
1242: "Dear Gordon Strachan, If you don't want or won't use Willo Flood or Barry Robson, can we have them back please? Yours, Dundee United." emmagadgie. A letter from Tayside on My Sport.
1241: Still no scoring here at St Mirren Park. A few early chances for both sides, and Scott McDonald even managed to put the ball in back of net but the ref rightly ruled it offside.
1239: Celtic find themselves under a bit of pressure for the briefest of moments there, with Nakamura having to track back to the goal-line in an attempt to clear the ball. I get the impression St Mirren are keen to avoid a thrashing. They're certainly taking the game to the visitors.
1238: "Any chance of a Jan Vennegoor of Hesselink goal today?" asks Nicky Nicholson, via text on 80295
1237: Re 1229: "People care. Just a shame that the quality of the league has deteriorated markedly over the last few years. And that includes both sides of the old firm. It's as poor as it has ever been." DavidAttenborough on My Sport. Surely not THE David Attenborough? Shouldn't he be off in the Galapagos Islands studying the migration patterns of puffins?
1233: "The game has settled just for a moment and it had to, it was playing at some pace." BBC Radio Scotland pundit Billy Dodds
1232: The pace slows down a little as Celtic's Darren O'Dea gets something in his eye and he receives treatment on the sidelines. The Celtic physio skooshes water over the young man's coupon in an attempt to wheek it out. I think he'll live.
1230: Scott McDonald puts the ball in the back of the St Mirren net with a glancing header from a Shunsuke Nakamura cross, but the ref waves for offside. No complaints from the diminutive Antipodean goal specialist for that decision.
1229: "Does anyone care. Rangers or Celtic win everything. Be good for Scottish football to take these clubs out of the cup." DrFossie. Have your say on My Sport or send your thoughts via text on 80295
1227: Jack Ross scythes down Scott Brown in the centre circle after the Celtic midfielder breaks free with a long ball. Ross better watch himself this week after getting sent in for an early bath last week and costing his team a 28th minute penalty at Celtic Park. He'll end up in wee Gus MacPherson's bad books if he doesn't behave himself.
1226: St Mirren look like they've been working hard on the training ground this week to exorcise the ghosts of last week's nightmare 7-0 demolition. They look sharp, determined and eager. I reckon this one is going to be a cracker today.
1222: Jan Vennegoor of Hesselink skies a chance over the bar from a tight angle on the left-hand side just three feet away from the St Mirren goal. He looked like he was trying to kick the neighbour's dog. Just seven minutes played, and it's blistering stuff already here at the new St Mirren Park.
1221: "Crosas is a gem of a midfielder, he's really coming good of late and I expect a big performance from him again today." EmmDee57. Have your say on My Sport
1219: The match has barely started and Garry Brady has a pop from the edge of the penalty area, but it's well beaten away by Celtic keeper Artur Boruc. Looks like St Mirren are off to a flyer and mean business.
1218: So big Jan is back for Celtic. Will the big Dutchman break his duck and put the ball in the back of the net?
Celtic: Boruc, Hinkel, Caldwell, McManus, O'Dea, Nakamura, Crosas, Scott Brown, McGeady, McDonald, Vennegoor of Hesselink. Subs: Mark Brown, Samaras, Hartley, Loovens, Conroy.
Today's referee is Charlie Richmond.
1214: Three more fab stats from my colleague Andy Campbell: Saints last reached the semi-finals of the Scottish Cup in 1987, the year they went on to win the tournament. Celtic have won the Scottish Cup more than any other club with 34 tournament victories. And, Celtic boss Gordon Strachan is gunning for his second Scottish Cup triumph with his side having won the trophy in 2007. Beat that Statto!
1208: St Mirren last beat Celtic during the 1989/90 season. The Buddies recorded two victories over the Hoops, including a 3-0 win at Celtic Park. Post us your crazy Scottish Cup stats at My Sport or send them via text on 80295
1205: So folks, we're getting geared up for the first big match of the afternoon here at BBC HQ in PQ. Do you think St Mirren goalie Chris Smith got a decent night's kip last night, or was he up all night wrestling with his pillow? Exactly a week ago, he conceded seven goals to the team he faces today - one of which was an own-goal from John Potter. That's enough to give you nightmares for a month.
1155: Welcome to one and all for Scottish Cup Saturday. Celtic face St Mirren in the early kick off at 1215 GMT, while Aberdeen travel to Dunfermline, and Inverness face Falkirk in the Highlands for places in the Scottish Cup semi-finals at Hampden.
I want to hear what you think of today's games as they unfold, so feel free to offer your pearls of wisdom here: My Sport and via text on 80295
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