Kheredine Idessane
BBC Sport Scotland at Rugby Park

We're into the final few minutes of the regulation 90.

The prospect of extra-time does not appear to be pleasing to the heavens which have opened spectacularly to send quite a deluge down on this particular part of Ayrshire.

Awful conditions for the players on the plastic park. A winning goal now or an extra 30 in the monsoon?

Lee McCulloch
Former Rangers midfielder & Kilmarnock manager on BBC Sportsound

I still think there will be another chance in the game, I really do.

Especially with Liam Boyce on the pitch.

Cammy Bell
Former Kilmarnock goalkeeper on BBC Sportsound

Late on in the game you're looking to put the other team under pressure, so I'd have put Danny Armstrong on it to put an inswinger into the box.

Looks like it's pelting it down in Ayrshire now.

Hmm, Matty Kennedy takes it instead, making it an outswinger.

It's cleared. Surely better for a left footer.

Up the other end, Killie have a free-kick on the right.

A dangerous crossing position for Danny Armstrong...

What a delivery from Stephen Kingsley.

The pace, power and accuracy is perfect. It just needs a touch from Kenneth Vargas, but he just can't get there.

Jorge Grant's night is over.

The Hearts goalscorer makes way for striker Liam Boyce.

Hearts-in-mouth stuff for Hearts as Zander Clark fails to gather Danny Armstrong's cross and takes a sore one in the process.

Steven McLean sees nothing wrong with it. Play on.

Kyle Magennis has had some second half.

He tries to make half a yard and hits one on the left of the box, but it's blocked behind.

Less than 15 minutes of regulation time remains.

Anyone fancy a winner?

A Killie switch now as Robbie Deas is replaced by Ipswich loanee Corrie Ndaba.

Jorge Grant looks to score with another low curler again.

But this time Will Dennis is equal to it.

Reminder that if this finishes level, we're heading for 30 minutes of extra-time.

Steven Naismith looks to his bench and it's a defensive switch.

Full-back Odel Offiah replaces winger Alan Forrest. A change of shape, surely?

Kheredine Idessane
BBC Sport Scotland at Rugby Park

The goal the Killie fans craved has finally arrived with just over 20 minutes left.

And what a noise they greeted it with. They're right back in this cup tie, which is anyone's now.

Hearts look to respond instantly.

Jorge Grant gets to the bye-line and looks to find Lawrence Shankland for a tap-in, but Will Dennis claims convincingly.

Lee McCulloch
Former Rangers midfielder & Kilmarnock manager on BBC Sportsound

I've got to say, brilliant from Matty Kennedy out wide with his double stepover away from Toby Sibbick.

And what an incredible header that is from Brad Lyons as the midfield runner.

Image source, SNS

Never mind. The goal stands.

As you were...