CLOSE!published at 16:10 Greenwich Mean Time 22 January 2022
Livingston 1-0 Ross County
Much better from Ross County at the start of this second half as Alex Samuel heads wide.
Listen to Sportsound commentary of Alloa v Celtic
Giakoumakis slams in & Abada lashes in second before Sammon pulls one back
Alloa's Niang escapes red for ugly lunge on Ideguchi - he joins McGregor & Abada in going off injured
Kelty knock out holders St Johnstone; Dundee Utd edge past Kilmarnock & Motherwell beat Morton in extra time
Aberdeen, St Mirren & Dundee beat lower-league opposition; Livingston overcome County
Colin Moffat
Livingston 1-0 Ross County
Much better from Ross County at the start of this second half as Alex Samuel heads wide.
Partick Thistle 1-0 Airdrieonians
The home side are ahead but now they're down to 10 men as Tunji Akinola is sent packing for hauling back Jordan Allan.
Kelty Hearts 0-0 St Johnstone
Big calls from the St Johnstone support for a penalty as a clearing header strikes the hand of Jordon Forster.
Seen softer ones given.
Kelty Hearts 0-0 St Johnstone
St Johnstone are out with more intent as Tony Gallacher's strike takes a nick and goes out for a corner.
The resulting set-piece breaks to Jacob Butterfield on the edge of the area, who catches his effort well but sees it sail just over.
We're up and running again at some of the grounds.
HT: Dumbarton 0 Dundee 0
Martin Dowden
BBC Sport Scotland at C&G Systems Stadium
It’s all square but what a massive advantage Dundee have now with the home side down to 10 men.
Dumbarton were preparing to take a free kick. Before it was taken Cammy Kerr went to ground and referee Colin Steven had no hesitation in showing a straight red card to striker Ross Maclean who appeared to lash out.
Ryan Sweeney came close with a close range header which he nodded off target before Jordan McGhee smashed one from distance with Sam Ramsbottom in the home goal doing well to tip over.
It couldn’t be better set up for Dundee now. A man advantage they really must capitalise on in this second half.
HT: Aberdeen 2-0 Edinburgh City
Tyrone Smith
BBC Scotland at Pittodrie
This has been a blistering performance by Aberdeen so far. Their attitude, energy and desire has been spot on. The only disappointment for the home side is that they are not going in to the break even further ahead - and they really should be.
It has been a tough shift so far for Edinburgh City, who will do well to keep the score down in the second half if the Dons maintain this level of intensity.
Hamish McKinlay
Holm Park goes wild as the ball is bundled in from close range.
Dundee United took an early lead through Marc McNulty and gave the impression it was going to be an comfortable afternoon for the Premiership side, but since then Kilmarnock have fought back, got their equaliser through Rory McKenzie, and have shaded the chances.
Finely poised at the break.
Dundee United's Mark McNulty makes it 1-0
The Sportscene TV camera pans to Callum Davidson on the stroke of half-time and the St Johnstone boss looks scunnered.
Aside from a Chris Kane header and an Ali Crawford strike, that forced Kelty keeper Darren Jamieson into two fine stops, Davidson's men have offered little against the fourth-tier hosts.
The longer this goes on, the more anxious the Perth side's manager will get.
St Mirren look to be easing into the last 16 of the Scottish Cup thanks to goals from midfield duo Kyle McAllister and Greg Kiltie.
Second-tier Ayr made a bright start, but the Premiership side came closest to scoring again when striker Kristian Dennis missed a great chance.
Dumbarton will be pleased to hear the half-time whistle after that Ross McLean red card - a chance to regroup.
Dundee have created precious little so far, but will be looking to make their numerical advantage count in the second half.
Livingston are good value for their lead through Ayo Obileye's penalty but Ross County need to remind themselves they are only one down.
Ryan Hedges scored the opener and set up Christian Ramirez for the second goal at Pittodrie. Aberdeen have been dominant.
They've had 21 shots, while League 2 Edinburgh City have yet to register an attempt on goal.
Motherwell have enjoyed the majority of possession and had a few decent chances too.
Connor Shields, Sean Goss and Barry Maguire have all had opportunities to open the scoring and Morton’s Jack Hamilton has been the busiest man on the pitch between the sticks.
Motherwell's Sean Goss had a good sight on goal
Kelty Hearts 0-0 St Johnstone
Nice play from Nathan Austin.
The Kelty striker takes the ball in well, turns and tries to bend one from range, but Zander Clark holds it.
The lone forward has put some shift in.
Andrew McCarthy
A swift turnaround in fortunes as Andrew McCarthy fizzes a shot into the top corner.
Dumbarton 0-0 Dundee
The League 1 side are down to 10 as Ross Maclean gets his marching orders for some off the ball skulduggery.
Russell McLean
All square again...
Motherwell 0-0 Morton
Motherwell seem to have lost a bit of their edge as half-time approaches.
A flurry of chances went unconverted and Morton are now managing to knock the ball about more confidently now.