Jim Duffy
BBC Sportsound summariser

Neil McCann
Former Scotland and Rangers winger on BBC Sportsound

St Mirren with the first effort on goal - and it's on target.

Captain Stephen McGinn volleys from just outside the penalty box as United clear a free-kick and goalkeeper Benjamin Siegrist gets down to push the ball clear.

St Mirren appear to be looking to keep the ball on the deck. But, after a spell of home possession, it is back up their end as United look to go more direct with the strong wind at their backs.

St Mirren have hardly been out of their own half in the opening minutes.

A few balls into their penalty box have been dealt with so far.

United get the game under way. We start all square, still looking for a goal, but there has to be one before the afternoon is out to decide which of these teams will be in the Premiership next season.

Neil McCann
Former Scotland and Rangers winger on BBC Sportsound

Here come the players out of the tunnel into a sold-out Simple Digital Arena and the sun has come just in time.

Jim Duffy
BBC Sportsound summariser

Neil McCann
Former Scotland and Rangers winger on BBC Sportsound

The rain has cleared at Simple Digital Arena, there's a wee bit of sunshine breaking through, but that wind is still swirling and it's bitterly cold.

Who will be frozen out of the Premiership next season?

Mark Reynolds' motivation is to avoid a personal relegation to the Championship.

The defender has been on loan to United from Aberdeen but has agreed a deal to make the move permanent at the end of the season.

Win today and he stays in the top flight next season.

Image source, SNS

Willie Miller
Former Scotland defender on BBC Radio Scotland

One Scot has already won a play-off final this weekend - Mickey Mellon leading Tranmere Rovers to promotion from League Two - and there's a chance for another today as Jack Ross' Sunderland side face Charlton Athletic.

Ahead of Scotland's Premiership Play-off first leg, St Mirren manager Oran Kearney suggested that we would be better off adopting the one-off final format that results in near-capacity crowds at Wembley.

The Northern Irishman thinks it would make it a bigger occasion, the counter-argument being that the clubs involved share two sets of home gate receipts. United counterpart Robbie Neilson has just backed up that view.

Which would you prefer? Thumbs up for a one-off final, thumbs down to stay with a two-leg final.

It's difficult to predict a winner from two sides showing improved form coming into the play-off final.

While St Mirren have only won two of their last five games at home, they are unbeaten in seven outings.

Meanwhile, United are on an unbeaten three-game run and have only lost one of their last five on the road.

Following that first-leg draw, they are now unbeaten in three meetings with St Mirren.

And they won on their last visit to Paisley, knocking St Mirren out of the Scottish Cup by 2-1 in February to end the Buddies' three-game winning run over the Terrors on their own patch.

St Mirren manager Oran Kearney sounded as cool, calm and collected as he did before and after the first leg but admitted he had a few nerves when he woke up this morning.

"Just the one change and there were a few aches and pains, but it was probably right to freshen it up," he tells BBC Scotland.

"The key thing for us is that we just need to go out and get the job done.

"We want to make sure the fans are right up for it."

Veteran centre-half Gary MacKenzie has shrugged off a knock to start.

"Gary's been outstanding," Kearney adds. "It's been no crazy fact that him coming back from injury has coincided with an improvement in our results."

Image source, SNS

Richard Winton
BBC Sport at Simple Digital Arena

Craig Brewster is being greeted by a steady stream of well-wishers in the main stand. It's a staggering 25 years ago this week that his goal against Rangers won Dundee United their first-ever Scottish Cup. He was also in the last United team to taste success in a play-off final, having been part of the squad that edged past Partick Thistle in 1996.

Neil McCann
Former Scotland and Rangers winger on BBC Sportsound

Dundee United head coach Robbie Neilson says his side have been practising penalties in the build-up to this one. He also talked our reporter, Chick Young, through the changes to his team.

"Osman Sow has had a wee bit of an injury the last few weeks to be honest and he's been digging it out for us, Peter Pawlett's the same," he says. "We wanted to have a strong bench and the two of them will be ready to come on at some point.

"The majority of the team have played in big games and been involved in it before, so they know the build up, they know what's at stake. So it's just about giving them some tips about what St Mirren might do, what we need to do and trust them to do the job."

Image source, SNS

Lewis Morgan helped St Mirren win promotion a year ago and today the winger will be looking to do the double as part of the Sunderland squad facing Charlton Athletic at Wembley at the same time as his former club.

He had been loaned back to the Buddies after his January transfer to Celtic, who this season sent him down to join former St Mirren manager Jack Ross at the Stadium of Light.

Morgan is on the bench, so maybe he'll have one eye on the St Mirren score on his mobile.