The second leg takes place at Somerset on Friday - again, you'll be able to watch that live on the BBC.

All to do for Thistle with a place in the semi-final against Livingston the prize.

Bye for now.

Ayr Utd manager Scott Brown tells BBC Scotland: "The lads' discipline throughout the 90 minutes, I thought we were well organised.

"Defensively we were brilliant... on the counter attack as well. The biggest thing I've noticed in the past week is us wanting the ball.

"There were too many petty yellow cards for my liking, for both sides, I didn't feel there were many bad tackles in the game."

Partick Thistle interim co-manager Mark Wilson tells BBC Scotland: "Disappointed with how we performed. In fairness I thought Ayr moved the ball better than us. They probably deserved the victory.

"It's up to us to get a grip of the game when the ball gets rolling. We just didn't settle well and Ayr pressed us well.

"The positive is it's a two-legged tie so it's certainly not done."

Couple of football cliches ticked off there from Mr Murphy.

Good end to a fine night's work for him.

Ayr United goalscorer Jamie Murphy tells BBC Scotland: "It's half time, it's not done. We'll go back to Somerset hoping to win the second leg.

"It's always great to score. That feeling doesn't change. It was a big game for us, but as I said it's only half time.

"There's a lot to work on and a lot we can get better at."

Ayr take a first-leg advantage back to Somerset.

Jamie Murphy's header the difference at Firhill.

Image source, SNS

Excellent defending from Lenny Agbaire in the closing stages.

Ayr are closing in on a huge first-leg win.

Scott McMann gets his body across Ben Stanway and the latter screams for a penalty.

Not enough there, again.

There were six minutes added, by the way.

Played two of them.

That feels like a moment.

Brian Graham steers a header just off target. Agony for Thistle.

Thistle have been unable to sustain any real pressure as the clock ticks down.

Heading towards the 90.

Steven Lawless' dangerous cross is cut out before Ayr clear another wicked delivery.

Thistle are knocking at the door.

Dan O'Reilly, welcome to David Dickinson's little black book.

Another yellow.

A big final 10, this.

Ah, another yellow card. It's been a while since we had one...

This one is for Lenny Agbaire for going through the back of Aidan Fitzpatrick.

Sore one for the Thistle winger.

Double Ayr switch as Jay Henderson and Curtis Main come on for goalscorer Jamie Murphy and George Oakley.

Fifteen minutes for Thistle to level this tie before they need to go to Somerset.

This is a big period in this two-legged affair.

Amy Canavan
BBC Scotland at Firhill

Plenty love for Marco Rus as he passes by the healthy away crowd.

Good innings from the the midfielder.

Scott Brown turns to his bench now as Ethan Walker replaces Marco Rus.