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By Keir Murray
1733: Look out for the highlights on Sportscene on BBC One Scotland tonight, and online too at the BBC Sport website. On Monday evening, Kilmarnock v Rangers is live on BBC One Scotland and will be streamed live online to UK users. All the best and thanks for joining BBC Scotland for today's Scottish Cup action.
1730: Freddie Ljungberg tells BBC Scotland reporter Chick Young that he is pleased to have helped Celtic through to the next round and that he doesn't mind handing over his jerseys to opposition players.
1726: The teams through to Tuesday's fifth-round draw so far are: Celtic, Motherwell, Aberdeen, Hamilton and Inverness CT. Several other ties still have to be decided.
1722: "Berwick did a good job, Celtic did a good professional job." BBC Scotland football pundit Billy Dodds.
1721: Celtic take their unbeaten run to eight games with a deserved, if unspectacular, win over the Third Division side.
Full-time: Berwick Rangers 0-2 Celtic
1719: Celtic Anthony Stokes attempts a shot from 30 yards but slices it well wide of the goal.
1717: Mark Peat snatches the ball before it crosses the Berwick goal-line, James Forrest close to scoring a header - though he knew little about it after a clearance was smashed against him.
1716: About three minutes to go. Celtic deserve the win but the part-timers deserve credit for their display.
1714: Anthony Stokes rattles the ball into the net but he was correctly ruled offside. A confident finish by the Celtic striker, all the same.
A beautiful bit of skill by Scott Brown as the Celtic captain takes a pass at the edge of the box, drags the ball under his boot, spins around and slides the ball past Mark Peat.
1709: GOAL! Berwick Rangers 0-2 Celtic (Brown)
1707: Mark Wilson's throw-in lands at the feet of Anthony Stokes but the Irishman is not at his best today and possession is lost to Berwick.
1706: The Celtic management team of Neil Lennon, Alan Thompson and Johan Mjallby look on impassively.
1704: Darren Gribben's contribution to this cup tie is over. He makes way for Alan Brazil.
1701: You wouldn't think there were 36 league places between the sides. Possibly 35, though... OK, I'm not Woody Allen.
1700: Daniel Majstorovic and Thomas Rogne lurk with intent at a Celtic set piece but the ball is cleared.
1656: James Forrest shows a nice bit of skill on the right wing and crosses for Paddy McCourt but the Irishman's header is comfortably saved by Mark Peat.
1654: An anonymous text to 80295: "Maybe the two Tic bookings were not helped by the pitch. Berwick wanted the game played to get the cash from Sky. Maybe the Berwick chairman only has eyes for the cash but he should think about his players. It's true what Lenny said about the pitch, it's in poor condition."
1653: Celtic look the more likely team to score but the men in yellow and black are defending well.
1651: It's Beauty and the Beast! Freddie Ljungberg makes may for Celtic captain Scott Brown.
1649: Is Freddie Ljungberg the most handsome player ever to wear a Celtic jersey? Let's think: there was Charlie Nicholas, Derek Whyte, Stan Varga... Aye, he must be in with a shout.
1648: The attendance at Shielfield Park is 3,788.
1646: Celtic defender Thomas Rogne is barged off the ball in the Berwick box by Chris McLeod. Calum Murray ignores the muted calls for a penalty.
Berwick defender Andy McLean is booked, presumably for dissent, after he was shoved in the back by Anthony Stokes as the pair raced for the ball.
1644: Celtic seem to have an extra man in midfield and are mopping up the loose balls. Berwick, though, with the game at 1-0, are still in it.
1641: A funny text to 80295 from Jason, who calls himself "a Gers man": "In London at the moment, missing the game, but I'm assured by the ghost of Paul the octopus that Berwick are going to hit back 3-1."
1640: Lukasz Zaluska saves at the feet of Berwick's David Greenhill, who made an intelligent run into the box.
1639: Charlie Mulgrew makes mess of a pass-back to Lukasz Zaluska but is rescued by the bravery of the Polish goalie.
1638: "The game is a bit scrappy at the moment. There is not a lot of great football being played." BBC Scotland football pundit Murdo MacLeod
1636: Neither side has made any changes at half-time.
1633: Chris McLeod is booked for smashing into Freddie Ljungberg.
1627: The floodlights are on and the scene is set for an entertaining second half.
1625: Gavin in Perth takes conspiracy theories to new levels. He has texted 80295: "After Celtic's Old Firm win, how is any team with Rangers in its name going to get a penalty against Celtic? It just isn't going to happen."
1621: A bizarre sight as a Berwick player takes possession of Freddie Ljungberg's jersey as the teams trudge off at half-time. Is the Swede being subbed at half-time, or did he bring a few tops for the souvenir hunters...in the opposition ranks?
1620: That was an enjoyable first 45. Poor Andy McLean will be kicking himself at his error at the Celtic goal.
Half-time: Berwick Rangers 0-1 Celtic
1617: Celtic's Joe Ledley leads with his forearm in an aerial challenge, Darren Gribben the victim. Calum Murray shows the Welshman a yellow card.
1615: Darren Gribben is caught offside again. He looked a bit sheepish there.
1614: Anthony Stokes nutmegs Andy McLean but falls to the turf and Berwick come away with the ball as we approach half-time.
1613: No signs of complacency in the Celtic line-up. They are working hard to get behind the ball when Berwick have possession.
1611: Paddy McCourt and James Forrest link up well in the right corner and the latter works his way infield and pings a left-footed shot a foot past Mark Peat's post.
1608: Just a thought, but is this the closest either of the Old Firm will come to playing in England?
1606: Unfortunately that pass for James Forrest - who took a poor first touch that limited his chance to score - was the last contribution by Georgios Samaras. He limps off and is replaced by Anthony Stokes.
1605: Mark Peat makes a close-range save from Celtic striker James Forrest after a lovely move by Paddy McCourt and Georgios Samaras.
1602: We have received a call here in the BBC Scotland office in Glasgow's Pacific Quay from telly folk in Sweden asking for pictures of Freddie Ljungberg's debut. What will they make of it all?
1600: Thomas Rogne gives away another free-kick in a dangerous area, but David Greenhill risks the wrath of boss Jimmy Crease by knocking the ball straight into the first defender. A howler.
1559: Celtic's Paddy McCourt threatens the home defence but the Derry Pele's efforts are stifled and the score stays at 1-0 to the visitors.
1556: Thomas Rogne concedes a free-kick 25 yards from goal. Berwick's Darren Gribben takes responsibility for the set play but thunders the ball over the bar, out the stadium, across the border and into Scotland.
1555: Celtic striker Georgios Samaras weaves his way into the box but his cross is blocked right in front of goal.
1553: You can catch the highlights of today's game on Sportscene at 2255 GMT on BBC One Scotland, and on the website, of course.
1552: There's a good atmosphere in the ground. The visiting fans, evidently, are the happier.
A bad mistake by Andy McLean, who fails to deal with an inswinging cross from the right wing by Charlie Mulgrew, is pounced on by the big Swedish defender Daniel Majstorovic and he lashes it into the net from three yards.
1545: No chances so far but it's clear both teams are "up for the cup", in Roy of the Rovers parlance.
1543: Mark Wilson makes a rash challenge and is shown a yellow card by Calum Murray.
1541: I am seeing some close-up pictures of the pitch. It looks a bit patchy in places.
1539: Celtic's Charlie Mulgrew is yellow carded for a foul on Steven Notman.
1537: Could this be a quiz question 30 years from now? Name the Berwick player who put the ball in the net against Celtic in 2011. Answer: Darren Gribben (but he was offside and the "goal" did not count).
1535: Steven Notman and Charlie Mulgrew meet once more, with the former unable to get round the Celtic man as the ball runs out for a goal kick.
1533: Celtic defender Charlie Mulgrew uses his body weight to knock Steven Notman off the ball in the box. A fair challenge.
1533: "Freddie Ljungberg is going to play through the middle, Paddy McCourt is on the left." BBC Radio Scotland football pundit Murdo MacLeod.
1532: The game kicks off in front of just over 4,000 fans.
1530: Berwick Rangers and Celtic swap ends and the visitors go into their huddle, possibly to conserve body heat
1528: The teams are wedged in the tunnel. It's almost like that at Rugby Park! "After you." "No, after you" etc.
1526: "We're not going to be totally negative. We have a game plan. We are going to play a 4-4-1-1." Berwick boss Jimmy Crease is a picture of openness. Not quite "let the opposition worry about us" but a healthy attitude all the same...
1524: Berwick manager Jimmy Crease reveals that the groundstaff were concerned about a few areas of the pitch at Shilefield but are happy that the game is going ahead.
1522: "Everything about Dundee reeks of the top division." Charitable comment on the Dee by BBC Scotland commentator Craig Paterson.
1517: "I thought it was a lot closer than 4-0." John Sutton is modest after helping Well through to the Scottish Cup fifth round.
1516: Dundee boss Barry Smith sounds as deflated as the balloons hanging in the office from the Christmas party. He is not a happy man at his team's performance in their thumping by Motherwell.
1513: Let's hope no stray dogs run on to the Shielfield pitch and trip up the Celtic superstar.
1511: "He has been training for a few weeks now and we thought this was a good chance to get some game time." Celtic manager Neil Lennon explains to Radio Scotland why he has selected Freddie Ljungberg for the match at Berwick.
1508: And the Celtic team is: Zaluska, Wilson, Rogne, Majstorovic, Mulgrew, Forrest, Kayal, Ledley, Ljungberg, McCourt, Samaras. Subs: Forster, Juarez, Brown, Stokes, Crosas.
1507: The Berwick Rangers team to take on Celtic is: Peat, Smith, McLean, McLeod, Thomson, Notman, Currie, Greenhill, McLaren, Little, Darren Gribben. Subs: McCaldon, Ewart, Brazil, McMullan, Ponton.
1505: "Everything was perfect for Motherwell today. They could even afford to bring on a couple of young boys, like Ross Forbes and Robert McHugh." BBC Scotland football pundit Billy Dodds
1503: That was more like the Motherwell we saw under Craig Brown. Team captain Stephen Craigan is grinning from ear to ear as he leaves the pitch.
Full-time: Dundee 0-4 Motherwell
1501: It's a happy day for Stuart McCall, who gets his first win as Motherwell boss.
As play resumes, the red mist descends on Leigh Griffiths and he is shown a straight red by Steve Conroy for a rank-rotten high challenge.
Jamie Murphy shows Craig McKeown a clean pair of heels, racing down the left, into the box and sliding the ball past Rab Douglas. Classy stuff.
1457: GOAL! Dundee 0-4 Motherwell (Murphy)
1457: Stuart McCall removes Keith Lasley from the game and sends young Ross Forbes on for Motherwell.
1455: Dundee could certainly have done with the cash that an extended cup run would have brought, but at least they will be able to focus on surviving in the First Division.
1454: That will be enough for a section of the Dundee support in the crowd of 4,200.
It's all too easy for the Steelmen as Steve Jennings directs Tom Hateley's lofted cross past Rab Douglas with a powerful header.
1452: GOAL! Dundee 0-3 Motherwell (Jennings)
1449: What a bizarre sight when the ball goes out of play. It is almost lost in the snow around the pitch.
1446: Midfielder Keith Lasley takes a crack on the old Hans Krankl from Dundee's Stephen O'Donnell but manages to hobble back into the action.
1445: "Lengthening shadows here at Dens Park." BBC Radio Scotland commentator David Begg paints a picture of the scene in Dundee.
1444: Leigh Griffiths is the filling in a Tom Hateley/Mark Reynolds sandwich. The Dundee striker falls to the ground in the box but the ref waves away his appeal for a penalty.
1438: Sean Higgins hammers through Motherwell defender Mark Reynolds in the box and Darren Randolph rushes from his goal to, er, remonstrate with the Dundee man. Ref Stevie Conroy books Higgins, Randolph and Steve Jennings.
1435: We are hearing that Freddie Ljungberg will indeed make his Celtic debut this afternoon.
1433: Dundee wide man Johnny Stewart makes way for Kyle Benedictis.
1433: Motherwell are in two banks of four as they defend stoutly.
1431: Dundee are still trying to play the ball on the deck, making short passes in midfield as they weigh up their attacking options.
1425: Leigh Griffiths is flagged offside - correctly - as he tries to slip the Well defence and get Dundee back into the game.
1424: Craig Forsyth takes an inswinging corner kick and Stephen Craigan heads the ball clear for another corner for Dundee.
1422: A text to 80295 from Henry asks if the Celtic game is live on the radio today. Yep, it is.
1420: Dundee almost hit back immediately, with Leigh Griffiths' curling free-kick rattling the Motherwell bar.
Just as they did in the first half, Motherwell score early and it's John Sutton who is the scorer once again, clipping the ball round Rab Douglas after being picked out in the box by Jamie Murphy.
1418: GOAL! Dundee 0-2 Motherwell (Sutton)
1415: Barry Smith shields his eyes against the sun as the Dundee manager dictates instructions to the players.
1414: Both teams are back out on the pitch. Dundee prepare to kick off the second half.
1410: What a job the groundstaff have done on the surface at Dens. I think they had put a call out asking for fans to come along to clear the snow. If so, they must have arrived with hot water bottles to melt the snow and some massive shovels.
1405: Celtic might give Freddie Ljungberg a start at Shielfield Park, where the Scottish Premier League leaders take on Berwick Rangers.
1400: Dundee 0-1 Motherwell
1359: Matthew Lockwood makes a tremendous challenge three yards from the goal-line to stop Motherwell going two ahead on the stroke of half-time.
1356: We're approaching half-time in what has been an entertaining game so far.
1353: "There was definitely a coming together of players..." BBC Radio Scotland commentator Craig Paterson reports euphemistically on Stephen Craigan and Leigh Griffiths clattering one another.
1352: That last comment, of course, is a reference to the numbers inside the ground, not the well-being and sound nutrition enjoyed by the fans.
1351: There looks like a healthy crowd inside Dens Park this afternoon, despite the horrible kick-off time.
1349: I may well be slow on the uptake but I cannot get used to this being the fourth round of the Scottish Cup. In my small brain, this will always be the third round when the wee teams take on the big boys.
1347: Aw, bad luck for Dundee. Leigh Griffiths, clean through on goal, is ruled offside when he was marginally onside.
1345: Rab Douglas makes an excellent point-blank save from John Sutton, who was unmarked in the six-yard box at the corner.
1343: A half-hearted clearance by Gary Irvine is collected by Motherwell midfielder Steve Jennings, who pushes the ball forward and the visitors win a corner.
1340: A half chance for Dundee. Gary Irvine heads at goal from the edge of the box and Darren Randolph clutches the ball after it looked like the looping header might just sneak under his crossbar.
1338: Dundee boss Barry Smith will be encouraged by the last 10 minutes or so. Gary Harkins is beginning to influence play in the middle of the park.
1335: Leigh Griffiths is halted by Motherwell defender Mark Reynolds but the striker wins a corner for his efforts.
1333: If you are in the UK, you can watch the highlights of Saturday's seven Scottish Cup ties. Look out for the penalty save by Alloa's stand-in keeper in their defeat by Hamilton.
1330: Tom Hateley competes with Craig Forsyth for possession as the home side push down the left wing. Dundee have caught their breath and are pushing Motherwell back now.
1328: Big Rab Douglas fumbles a corner but then launches a swift move for Dundee, his almighty throw up to Craig Forsyth allowing the midfielder the chance to pass to Leigh Griffiths, who had the ball nicked off his toe by the Well goalie before he could shoot.
1324: Stephen O'Donnell hoofs the ball out for a corner to Motherwell but Dundee manage to clear their lines.
1323: Striker Leigh Griffiths holds the ball up for Dundee on the halfway line as he tries to release the pressure on his defence.
1322: It's one-way traffic as the men in claret and amber run down the slope at their hosts.
1321: Chris Humphrey blooters a left-footed shot over the bar from outside the box, as the Steelmen pound the Dens defence.
Motherwell take an early lead thanks to John Sutton, who stabbed the ball home from a few yards out. Jamie Murphy supplied the cross, using his pace down the left to escape the Dundee defence.
GOAL! Dundee 0-1 Motherwell (Sutton)
1317: There is a good tempo to the match so far in these early exchanges.
1316: The winter sun might cause goalkeepers Rab Douglas and Darren Randolph a problem. Most of the pitch is in the shade but there is a strip which could cause the goalies a bit of discomfort.
1315: And we're off! Enjoy.
1313: While Dundee are playing with confidence, Motherwell have not won in their last six matches.
1311: The teams make their way on to the pitch, which looks in excellent condition.
1308: Dundee are in very good form so Motherwell face a tough cup tie at Dens. Let these stats waft over you for a moment: the home side have won their last six games on the trot; they have not been beaten since they went into administration nine games ago; and they are unbeaten at home since January 2010.
1304: East Stirlingshire's home game against Buckie Thistle was called off at 0930 GMT today and Hearts' tie against St Johnstone, scheduled for this afternoon, was postponed on Saturday because of burst pipes at Tynecastle.
1301: And the Motherwell team is: Randolph, Fitzpatrick, Craigan, Reynolds, Hammell, Humphrey, Lasley, Jennings, Hateley, Murphy, Sutton. Subs: Hollis, McHugh, Forbes, Hutchinson, Casagolda.
1300: Some team news for you all. Dundee go with: Douglas, Irvine, McKeown, Weston, Lockwood, Stewart, O'Donnell, Harkins, Forsyth, Griffiths, Higgins. Subs: Gibson, Benedictis, Mcintosh, Webster, Carnegie.
1255: Welcome to another live text from BBC Scotland. The focus today is on the two Scottish Cup fourth-round ties to have survived the cold weather - Dundee v Motherwell and Berwick Rangers v Celtic.
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