That's it.

They've given everything and they can't be separated.

We will have penalties to decide who will play Huddersfield Town in the Championship play-off final.

It's been pulsating and there's so much more drama still to come.

Oh my!

Jack Robinson goes down in the area under a challenge from home keeper Brice Samba.

Is it a dive?

The referee gives neither a penalty nor what would have been a second yellow and a red for Robinson.

Two minutes added on at the end of 120.

Forest make another change.

James Garner is off and Cafu (not that one) is on.

Conor Hourihane whips in a low cross that Morgan Gibbs-White can't quite get a toe on for the visitors.

Just seen a replay of that Brice Samba save from Iliman Ndiaye.

The Reds goalkeeper came out and did the old Peter Schmeichel star save.

How pivotal could that prove to be?

Carl Asaba
Former Sheffield United striker on BBC Radio Sheffield

What an incredible game. These two sets of players, what a show they've put on.

Chances at both ends!

First Brice Samba makes a brilliant reaction save to keep out Iliman Ndiaye's close range shot.

Then the home side race down the other end and Joe Lolley sees a curling shot drift wide after cutting in.

Blades midfielder Sander Berge has a go from distance and his shot deflects for a corner.

Fair play to Sheffield United for battling back into this.

They were 3-1 down on aggregate at half-time but they came out all guns blazing at the start of the second half and deservedly levelled things up.

That's taking one for the team.

Nottingham Forest defender Steve Cook clatters Morgan Gibbs-White as he looks to make progress into the Forest half.

Is there going to be one more chance in this match?

Into the final 10 minutes.

Paul Heckingbottom decides to break with tradition and make a couple of changes for the Blades.

Ben Osborn is on for George Baldock and Conor Hourihane is on for their second goalscorer John Fleck.

Chances!

Joe Lolley plays a great one-two with Brennan Johnson but just when he goes to shoot he slips and his tame effort goes straight at Wes Foderingham.

Johnson then gets an acrobatic volley on Djed Spence's cross but straight at Foderingham again.

Right, we're back under way AGAIN.

I wont lie, I'm starting to flag now and I'm sat down so I can't imagine how these players must be feeling.

Carl Asaba
Former Sheffield United striker on BBC Radio Sheffield

I don't think anyone wants penalties. I think they'll both try and win this at all costs.

Nothing doing in the first half of extra time.

Do penalties now loom?

I still can't get over the fact Blades boss Paul Heckingbottom hasn't made a single change.

He doesn't have a huge amount of options on his bench but his starting 11 have got through a huge amount of work out there.

James Garner floats over a free-kick for the home side but it's too deep really.

His set pieces haven't been great this evening it has to be said.

The 100-minute mark is up.

There's been a half-chance apiece in this first half of extra time.

Blades boss Paul Heckingbottom is still yet to make a substitution.

A bit like Terry Venables for England against Germany in the semi-finals of Euro 96.

Huddersfield fans must be loving this.

Their team are getting an extra day's rest before the final plus they didn't have to navigate extra time.

The pace of this game has been relentless, never mind the emotional energy expended.

Image source, Rex Features