So, at the end of a long and topsy turvy day, we have Aberdeen six points clear of Rangers in second place in the Scottish Premiership after they came from behind to defeat Kilmarnock with two late goals.

The Ibrox side failed to keep pace thanks to their 2-1 defeat away to Dundee, who overtake Killie and Partick Thistle and move into sixth place.

Meanwhile, St Mirren beat TNS to advance to the final of the Irn Bru Cup.

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St Mirren will face Dundee United in the final on the weekend of 25/26 March, with the specific date and venue to be confirmed this week.

United manager Ray McKinnon says he expects the Buddies to take confidence and improve ahead of the final as they look to escape relegation in the Championship.

With TNS failing to become the first non-Scottish team into the Challenge Cup final, it will be between two Championship rivals and McKinnon expects a large crowd and a tough game for his side.

St Mirren manager Jack Ross on BBC Alba: "First-half, horrendous, second half, very good.

"I was very angry with them at half-time and the reaction was terrific in the second half and, prior to the sending off they were good and thoroughly deserved it in the end.

"I thought we had the momentum and were the better team before the sending off.

"I feel the sending off comes because of the way were playing and forcing them to make rash tackles.

"We are starting to build momentum and have to go and make it a third win in a row next week at Ayr."

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Dundee United manager Ray McKinnon on BBC Alba: "I think St Mirren have been excellent in the second half and have kept TNS very quiet.

"They have even had the luxury of missing a penalty.

"It was very even in the first half, but I think the change Jack made bringing on Lewis Morgan and pressing high up the park, basically going 4-2-4 and keeping TNS back was fantgastic and they definitely deserved it in the second half."

St Mirren midfielder Stephen McGinn on BBC Alba: "I was here as a young player when we last won the Challenge Cup and it was a brilliant day, a great game and we took a good crowd there.

"Us versus Dundee United is a Premier League final. they'll take a big crowd, we'll take a big crowd and it will be a great occasion to be a part of."

St Mirren midfielder Stevie Mallan on BBC Alba: "We are very delighted. 

"It was a tough team we played against on a good run of form and they've come across and beat a few teams in the cup already.

"The boys are just delighted to get a win on the board and give the fans something to sing about.

"In the first half, we were a bit sluggish and I think we just pressed them more."

TNS suffer only their second defeat in 32 games as St Mirren take advantage of Stephen Saunders' second-half yellow card to run out convincing winners in the semi-final of the Irn Bru Cup.

The Welsh Premier League leaders were worthy of their lead, but the Saints made them pay for the former Motherwell defender's inadvisable lunge.

The Buddies go forward to face Championship rivals Dundee United in the final.

Dundee United manager Ray McKinnon has named St Mirren midfielder Stevie Mallan, the scorer of his side's second goal, as his man of the match on BBC Alba.

TNS have four minutes, plus a bit of stoppage time, to stage an unlikely comeback with 10 men if they are to keep their Irn Bru Cup fairytale alive.

It looks an impossible task.

The Buddies squander a great chance to virtually kill the game as John Sutton has his penalty saved by TNS captain Paul Harrison.

It was awarded after the ball struck the arm of midfielder Aeron Edwards.

St Mirren are eight points behind Ayr United at the foot of the Scottish Championship, but they are turning into cup specialists.

They have only won twice in their last nine outings and those have both come in knock-out competitions.

Manager Jack Ross would probably trade those for league points!

Suddenly, St Mirren are looking like a different team and they look unfortunate not to win a penalty when Philip Baker comes in behind John Sutton as the striker looks likely to score from four yards out.

Referee Keith Kennedy goes straight to his red card as Steven Saunders flies into a tackle on Buddies scorer Stephen McGinn.

It was a strong challenge from the former Motherwell, Ross County and Dumbarton defender, but he is a tad unfortunate not to escape with a yellow.  

TNS continue to lead in Paisley and there are few signs that St Mirren have the firepower to deny the Welsh champions a place in the final of the Irn Bru Cup.

Image source, SNS