GOAL Broxburn Athletic 0-6 Ayr Unitedpublished at 16:34 Greenwich Mean Time 18 January
Jake Hastie
Watch: Ayr make it six in Broxburn rout
See in-play clips of best goals
Muirhead (pen) gives Livingston lead; White levels for County; Montano restores lead; Hale equalises again to force extra time; Shinnie forces in winner towards end of extra time
Morris nets for Aberdeen at Elgin; Duk adds second & third goals
Olusanya double for St Mirren; Queen of the South pull one back
Colin Moffat
Jake Hastie
Watch: Ayr make it six in Broxburn rout
Hibernian 3-0 Clydebank
Lewis Gillie is on for Hibernian. It's a senior debut for the 16-year-old defender.
Kwon Hyeokkyu makes way.
George Oakley
Watch: Ayr score their fifth
Ronan Hale
County hit back! Hale gets on the end of a cross from the right and fires high into the net.
It's a brilliant finish from the striker who had been trying so hard, with little coming off. Now he's got the goal, he'll be confident.
Livi's defence aren't happy though. They're still arguing with the assistant referee as the game kicks off, they think it was offside.
Watch: County level again against Livi
Duk
Game over!
Aberdeen pressure eventually tells, but in controversial fashion.
Duk's header from a corner is held by goalkeeper Aidan Glavin, but the referee rules that it has crossed the line, much to the anger of the Elgin players.
Watch: Duk doubles Dons' lead
Queen of the South 0-2 St Mirren
There will be no Scottish Cup hat-trick for St Mirren's Toyosi Olusanya.
He is replaced up front by Owen Oseni, while Caelan Boyd-Munce is also on for Killian Phillips.
Mark McKenzie
Watch: Ayr grab their fourth
Queen's Park 1-2 Montrose
Gully Singh
BBC Sport Scotland at Hampden Park
The home fans are not happy one bit after watching their team throw away their lead to after wasting a handful of chances in the first period.
The travelling support may well enjoy their long return journey if they can see this one out.
Ross County 1-2 Livingston
Livingston almost make it three as Daniel Finlayson's header hits the back post.
Ross County just do not look like scoring.
Elgin City 0-1 Aberdeen
Aberdeen should extend their lead.
They have a five-against-one break, but goalkeeper Aidan Glavin turns wide Shayden Morris' drive and the winger is denied his second goal of the game.
The Dons have not put this tie to bed and now they have to scramble clear a corner at the other end.
Hibernian 3-0 Clydebank
Warm applause from the Hibs fans as summer signing Kieron Bowie returns from a long-term injury to replace Martin Boyle, who departs with a brace secured.
Luke Amos is also on in place of midfielder Dylan Levitt.
Blair Lyons
Blair Lyons with a quickfire double and the League One side are on course to take a Championship scalp.
Queen of the South 0-2 St Mirren
Mikael Mandron has a chance to make it three for St Mirren, but home goalkeeper Ross Stewart is off his line quickly to smother the striker's shot.
St Johnstone 1-0 Motherwell
Motherwell with their best chance of the game but Sven Sprangler keeps the visitors out with a brave block in front of goal.
Cristian Montano
Livingston retake the lead quickly!
Robbie Muirhead's monster long-throw bounces to Montano in the box, with the Colombian twisting and firing into the bottom corner.
Watch: Livingston retake lead against County
Martin Boyle
And that's the game.
Martin Boyle thrashes in the Hibees' third of the afternoon when a failed clearance falls into his path inside the box.
Watch: Boyle scores his second, Hibs third
Blair Lyons
Hibernian 2-0 Clydebank
Rudi Molotnikov nearly nabs his second with a glancing header, but a solid goal-line block thwarts the Hibs youngster's close-range effort.
Jay Henderson
Watch: Henderson scores a second to make it 3-0
St Johnstone 1-0 Motherwell
It's a similar story to the first half at McDiarmid Park, Motherwell are under the cosh as Graham Carey rockets his shot off the post.
St Johnstone should be ahead by more.