Scott Sinclair scores twice from close range for Celtic after being denied from the spot
Timothy Weah marks debut with goal to make it three for holders
10-man St Mirren come from two goals down to beat Alloa
Mark McGuigan's header earns Stenhousemuir a draw at Aberdeen
Ross County hold on as Brian Graham's double edges out Motherwell
McCracken header gives Junior side Auchinleck famous win
HT: Kilmarnock 1-0 Forfar Athletic
Kenny Crawford
BBC Sport Scotland at Rugby Park
Killie have the lead through Stuart Findlay’s third goal of the season - a superb left-footed volley into the top right corner - but Forfar will feel slightly hard done by, because they matched the hosts for the majority of the first half.
Both Thomas Reilly and Murray MacKintosh were unlucky not to hit the back of the net for the Loons.
Stevie Mallan
Florian Kamberi is bundled over and it's second penalty for Hibs, this time Stevie Mallan steps up and slams it home.
Jesse Curran
Dundee are back level as Jesse Curran fires home.
Motherwell 0-0 Ross County
Get in touch with your pictures out and around the grounds today on Scottish Cup fourth-round day.
Here's one young Motherwell fan, taking the phrase "would rather watch paint dry" a bit too literally at Fir Park...
Callum Booth
United playing well and in command at Links Park after Callum Booth adds to Pavol Safranko's opener. The left-back makes ground down the flank, cuts inside, and shapes a finish into the far corner.
Image source, SNSKilmarnock 1-0 Forfar Athletic
Forfar have been pinging the ball about confidently and at speed, pushing their Premiership hosts back into their own half and force a fine same from Jamie MacDonald.
John Baird tries his luck from range, but the goalkeeper turns it wide at full stretch.
Hibernian 2-0 Elgin City
The day started well for Florian Kamberi as he tucked in the opener at Easter Road, but the Hibs striker then missed a golden chance for his 11th goal of the season when he failed to convert from the penalty spot.
Image source, SNSSt Johnstone 2-0 Hamilton
Hamilton goalkeeper Ryan Fulton slides out of his box while holding the ball and concedes a free-kick.
No card for Fulton, but this game couldn't really be going much worse for Hamilton.
Motherwell 0-0 Ross County
Martin Dowden
BBC Sport Scotland at Fir Park
Motherwell are looking a tad rusty as they return from their winter break and try to integrate new faces, including Ross McCormack.
It is just not happening right now, with chances very limited for the home side thus far.
County look sharper and have created the best of the openings, with Brian Graham very close to nodding in from close range and Jamie Lindsay denied at the last by a timely challenge.
Well boss Stephen Robinson is trying to implement a change in formation with four at the back, but it looks like it may take a little time to gel.
Image source, SNSMotherwell's Elliott Frear holds off Ross County's Declan McManus (right)
Kevin Cawley
Kevin Cawley finds the net with a powerful drive and his fifth goal of the season puts St Mirren deep in trouble.
The Championship part-timers are two ahead with their Premiership hosts down to 10 men.
Hibernian 2-0 Elgin City
Steven Whittaker is chopped down and Florian Kamberi steps up to take the spot-kick but his effort is pushed round the post by Thomas McHale.
St Mirren 0-1 Alloa Athletic
Brad Lyon's St Mirren debut ends prematurely as the Irish midfielder is shown a second yellow card after taking a dive.
Liam Polworth
Caley Thistle are well on their way to the fourth round as Liam Polworth finishes off from Joe Chalmers set-up.
Stephen Dobbie
The Championship visitors are ahead at Dens Park as Josh Todd cuts the ball back for veteran marksman Stephen Dobbie to slam in his 33rd goal of the season.
Kilmarnock 1-0 Forfar Athletic
Kenny Crawford
BBC Sport Scotland at Rugby Park
There’s a sarcastic cheer from the home fans as Kris Boyd shows a little burst of pace to try to get past Loons defender Michael Travis, who quickly recovers. All smiles from Boyd afterwards!
Tony Watt
Tony Watt is first to the ball to knock in the rebound after Ryan Fulton saves Ross Callachan's shot. It's two-goal lead for St Johnstone.
Image source, SNSAlan Trouten
Alloa's Mr Goals, Alan Trouten, fires Alloa into the lead in Paisley.
That's his 16th of the season and it there could be a shock in store against their Premiership hosts.
Image source, BBC SportInverness CT 2-0 East Kilbride
Lowland League side East Kilbride are up against it at Caledonian Stadium.
Jordan White's early opener has been added to by Aaron Doran.
Image source, SNSJordan White put Inverness into the lead
Daryl Horgan
A calamity for Elgin keeper Thomas McHale as he hesitates to come for a Vykintas Slivka cross and that gives Daryl Horgan time to nip in and head home before he's clattered by the dithering goalie.
Aaron Doran
Caley Thistle look to have put this tie to bed against the Lowland League visitors as winger Aaron Doran fires their second goal from the edge of the box.
