We're in an odd period just now whereby Ulster are working their way into the Edinburgh red zone but then falling foul of the referee before Edinburgh exit and are then themselves penalised. And so it does back and forth.

Billy Burns pings a cracking penalty kick from hand into the Edinburgh 22. Can the visitors make their territory pay?

Tony McWhirter
1999 Ulster European Cup winner on BBC Radio Ulster

"If Stockdale aspires to be an international full-back, that needs to be meat and drink.

At this level of rugby, you have to snaffle those."

It's early days of course but how big will that moment prove to be?

Ulster looks to batter their way over but some big defence from Stuart McInally and Hamish Watson among others keeps them out.

John Cooney throws a loose pass that bobbles about the deck before Jacob Stockdale knocks on and Edinburgh get out of jail.

Ulster are pounding near the Edinburgh line, with Jordi Murphy and Marcell Coetzee carrying hard.

The Edinburgh defence is strong, but they stray offside again and it's another penalty to the visitors.

They pass up the kick at goal as Billy Burns kicks to the corner.

Edinburgh are penalised and Ulster kick to the corner.

Can they strike back immediately?

Tony McWhirter
1999 Ulster European Cup winner on BBC Radio Ulster

That's nothing more than Edinburgh deserve for their last passage of play, but nothing for Ulster to panic about at the minute.

That penalty came from a Burns knock-on just outside of the Edinburgh red-zone, unforced penalties are going to kill Ulster tonight.

Duhan van der Merwe makes the initial incision as Edinburgh get on the front foot.

Some mean Ulster defence momentarily stalls the move, but the ball is whipped wide again and Blair Kinghorn breaks through and feeds Van der Merwe again who makes a few more yards.

Ulster concede a penalty so Jaco van der Walt goes to the skies but Darcy Graham sees the cross-field kick sail over his head.

Back for the penalty and Edinburgh kick to touch within 5m of the Ulster line.

Edinburgh are keen to get the ball to Duhan van der Merwe as quickly as possible, but he's chopped in the tackle and some great work at the breakdown from Ulster number eight Marcell Coetzee wins his side the penalty and they can clear downfield.

Stuart McCloskey has clearly been identified as the man to watch in the Ulster midfield, with Edinburgh's Jaco van der Walt and Chris Dean meeting the powerful centre on the gain-line with a double-team tackle.

The home side signal their intentions from the off by spreading the ball wide and into the hands of danger man Duhan van der Merwe. The big wing breaks through the first tackle but is hauled down and Ulster scramble back into position to shut down the attack.

Edinburgh's Blair Kinghorn gets us under way at Murrayfield.

The teams emerge onto the field and we are just about ready to go.

Perfect conditions, just the tiniest breath of wind in the air.

I'm excited. Let's hope we get one of the great semi-finals.

Peter Wright
Former Scotland prop on BBC Radio Scotland

Image source, SNS

Leinster lie in wait in the Pro14 final for whoever prevails between Edinburgh and Ulster this evening.

The defending champions gave a typically effective display to overcome rivals Munster to reach a ninth final in 11 seasons.

They are hunting a third straight title and no matter who they face in the final, Leo Cullen's men will be overwhelming favourites to retain their crown.

Image source, Getty Images

Tom English
BBC Scotland's chief sports writer at Murrayfield

The last time Ulster fetched up in Scotland for a PRO14 semi-final they got butchered 50-20 by Glasgow at Scotstoun. It was their fourth losing semi-final in five years, so you could say that the visitors are pretty sick of losing on days like this. All four of those semis were away from home and now here is another away trip, this time to Murrayfield.

Ulster are missing four key players in Will Addison, Luke Marshall, Robert Baloucoune and Iain Henderson - a key part of the team has made it into the last eight of the European Cup. That side has been badly compromised by injury and loss of form. You'd have a long search before finding somebody who fancies them tonight. They've lost their last two matches since rugby's return - against Connacht and Leinster.

Edinburgh's record in knockout rugby under Richard Cockerill has seen them lose three out of three, but this should be different. They have a stellar team, few injuries and lots of confidence. This could be a momentous night for them if they deliver what we know they're capable of.

Scotland lock Grant Gilchrist will make his 150th appearance for Edinburgh as one of eight changes from the side that lost to Glasgow last time out.

Scotland stars Mark Bennett, Rory Sutherland, Stuart McInally, WP Nel and Ben Toolis return to the starting XV along with experienced half-back pairing Jaco van der Walt and Nic Groom.

Fly-half Billy Burns returns to captain Ulster, while Louis Ludik starts on the wing and Alan O'Connor slots into the second row.

Full-back Jacob Stockdale and winger Rob Lyttle complete the Ulster back three along with Ludik - while, for the third game in succession, James Hume and Stuart McCloskey will pair up in midfield.

Image source, Twitter

Image source, Twitter