Here we go, 15 minutes of regular play for Port Vale or Swindon to find the winner and avoid the dreaded penalty shoot-out.

Not many chances in front of goal during that 15 minutes, but we did have a big moment in the match as Port Vale manager Darrell Clarke was shown a red card meaning he sees out the match from the stands.

Image source, Getty Images

Ged Scott
BBC Sport at Vale Park

Still another 15 minutes to go.

And maybe a bit more drama beyond that if It goes to pens.

But fans are already being warned over the public address system to stay off the pitch at the end, whatever happens next!

We’ve already seen enough distasteful scenes in English football this week. It would be nice to think that everyone plays ball.

The deadlock is still not broken as we reach the half-way mark of extra time.

Just 15 minutes to go before this match heads to penalties. Time for a quick pep talk and chance to catch your breath and grab a drink.

Can anyone find the winner?

Ellis Iandolo picks the ball up right on the halfway line and makes a good run right through the Port Vale half towards the box.

He gets his shot away but it takes a deflection and Aidan Stone can easily gather it.

Steve Hale
Ex-Swindon goalkeeping coach on BBC Radio Wiltshire

I think the standards have held up pretty well but I do see some tiredness out there.

It's who can withstand that and create that bit of quality.

It's all getting a bit scrappy in front of goal, which is understandable as this match runs into the 105th minute and all the players start to tire.

We're almost at the end of the first period of extra time, but the fourth official has added on an additional four minutes.

Ellis Iandolo is back up and running but appears to be in a bit of discomfort still as he jogs back onto the pitch.

Ellis Iandolo goes down on the right wing after a bit of contact with Ryan Edmondson and looks in a fair bit of pain as the Swindon medical team run onto the pitch.

Harry McKirdy is facing his former club and he's getting booed by the home fans almost every time he touches the ball.

He's got 23 goals for Swindon this season, but has struggled to create much tonight.

James Wilson makes an excellent break from the halfway line for Port Vale and gets through the Swindon defence.

He manages to pick out Harry Charsley on the left but the linesman flags him narrowly offside as he broke the Robins' line.

Swindon's captain Dion Conroy has also found himself written into the referee's note book with a yellow card at the end of that fracas.

Steve Hale
Ex-Swindon goalkeeping coach on BBC Radio Wiltshire

Darrell Clarke has seemed agitated all night but now he's stepped over the mark in the referee's eyes.

Image source, Ged Scott - BBC Sport

We've got a bit of a scuffle on the touchline as lots of players and staff from both sides swarm in a big mass on the edge of the pitch.

It seems to have come from both players appealing for a throw-in as the ball-boy went to give the ball back.

The referee has made a huge call and sent Port Vale manager Darrell Clarke off and into the stands at the end of it after coming together with Swindon captain Dion Conroy.

It hasn't quite been Harry McKirdy's night so far.

The Swindon top scorer makes a dangerous-looking run in-field through the Vale defence, but his second touch lets him down and the ball runs away from him.

And we're off again, two 15 minute halves of extra time coming up.

Phil Sproson
Former Port Vale captain on BBC Radio Stoke

It's on a knife-edge. There are some tired legs out there. You can see that some of the players are treading water.

Adam Yates
Former Vale defender on BBC Radio Stoke

The players need to get some fluids into them, some energy gels and then get themselves focused.

It won't be just tired legs that could create chances for the opposition, it could be tired minds.

That's it. We've reached the end of 90 minutes and we're heading to extra time.

Remember, away goals don't count tonight so if the score is still a draw at the end of the next 30 minutes we're going to penalties.

Swindon give away a free-kick right on the edge of their box in an area they really don't want to.

James Wilson takes it and his shot gets past the wall, but Lewis Ward collects it well.