Sunderland right back at it, as Patrick Roberts scuttles down the right, and doubled up upon, he wins a corner from Alfie Doughty's touch.

Roberts sets the ball on the quadrant, bends it near post. Pierre Ekwah is beaten to it by Elijah Adebayo, who almost puts through his own goal.

It's a great save by Ethan Horvath, and the ball pings behind after Ekwah's cross is blocked by Amari'i Bell.

Sunderland players scream for a penalty like fielders baying for a wicket in the cricket. Simon Hooper brushes them aside.

Leon Barnett
Former Luton defender on BBC Three Counties Radio

Image source, Rex Features

Fantastic for Luton, I think Gabriel Osho is my new hero, scoring against Watford in the derby and now in the play-off semi-final.

He reacts first after a bit of pinball after the deep corner comes in and pokes it home.

Luton are really taking advantage of the set-pieces at the moment.

Leon Barnett
Former Luton defender on BBC Three Counties Radio

I think Sunderland will be happy to sit back and play on the break.

With the pace that Amad Diallo can offer, I think they'll be happy to play on the counter attack, especially with three at the back.

Luton have started really well so far with a big physical presence up front.

Image source, Getty Images

Luton are definitely playing with that extra edge tonight, much more charged than they were on Saturday.

That said, they were 1-0 up around this time too.

Sunderland still trying to ping the ball around with first-touch passes, but the tighter pitch needs you to be really on the ball.

Luton spread the play wide with Carlton Morris cutting out a Sunderland clearance and picking out Alfie Doughty, but the winger is shrugged off it.

Sunderland break, Amad Diallo tries to bundle his way through in the box, though Marvelous Nakamba's foul subsequently gives the visitors a free-kick.

Alex Pritchard tries one of those valve-hit wobblers from the set-piece, but it zips wide. Ronaldo-style.

Luton enjoying some early possession, with a clear directive of trying to get the ball forward quickly.

Sunderland soak it up.

The visitors get it forward, Joe Gelhardt nods the ball beyond Tom Lockyer, the pair come together and Luton get a free-kick.

Lively opening. No tentative feeling the way into this one.

Image source, Reuters

Simon Hooper, the referee when Sunderland were promoted at Wembley last season, is the main official tonight.

All the pre-match ceremony is complete. It's time. No backward steps from here.

Luton's arm-in-arm stand together is complete. They get us under way.

Kenilworth Road bathed in evening sun.

The Sunderland fans have been mocking the Luton 'Hatter' mascot. Harsh.

Lovely night for football. Those who have travelled from the north east have certainly escaped the rain.

Sunderland are heading out of their dressing room, wearing track tops marking 50 years since their famous FA Cup final win over Leeds United.

Natty gear. Might they be heading back to Wembley in 2023?

Luton ready for business. No such nostalgia for them.

They're heading out now. Kick-off is almost upon us.

Leon Barnett
Former Luton defender on BBC Three Counties Radio

I think Luton have to go out to attack, but you don’t want to leave yourself too open. The first goal is going to be so important, especially for Luton.

I think after the heartache of last year, having the second leg here allows the fans to play their part. I think the fans are going to make themselves known.

Tony Mowbray is very tactically smart, he'll set his team up to defend and takes pride in keeping clean sheets, as a former defender. It wouldn't surprise me if he's told the players to have their keep-ball session right in front of these Luton fans.

Marco Gabbiadini
Ex-Sunderland striker on BBC Radio Newcastle

That’s probably Sunderland's best team.

I thought about this earlier on and it turns out they haven’t watered the pitch - I'm not sure about it bouncing higher but it means it won't skid through as much.

I don’t think it will be a huge problem if they don’t water it before kick-off, the pitch is in good condition and I think the ball will roll well - it’s not one of the bobbly, sandy pitches of 20 years ago.

Image source, Getty Images

Sunderland are bidding to replicate a feat I think last achieved by Neil Warnock's Notts County back between 1989-90 and 1990-91, and that is promotion via the play-offs from third to first tier in back-to-back seasons.

Their win over Wycombe last year ended a horrendous run of Wembley woe, and took them back to the second tier after four seasons away.

This promotion opportunity was not expected given the Wearsiders' late gatecrash of the top six, so the pressure is off; but given the position they're in the fans might just start to feel some nerves after a 'free hit' first leg.

Luton got to the Championship play-offs last season but were vanquished at the semi-final stage by Huddersfield.

Hatters skipper Sonny Bradley cancelled out Danel Sinani's early goal in the first leg, but despite their efforts, Jordan Rhodes' late goal took the Terriers through instead.

It is one of a list of play-off failures for Luton, from losing to Crewe, York and Blackpool on aggregate in 1996-97, 2009-10 and 2016-17 respectively, through to National League promotion final defeats by Wimbledon and York again.

Another missed opportunity would be crushing for a team that has proved itself to be a consistent challenger over the past two seasons, and whose proud history would merit a place in the Premier League.

Image source, PA Media

Having seen his own game plan executed to perfection in the home leg, Sunderland manager Tony Mowbray takes his side south in a bid to finish the job.

Mowbray hailed Sunderland's "bravery" in taking Luton on with a sharp passing game, despite giving way in terms of physicality and size to their opponents.

The 59-year-old is wary of the home side's threat, though, and what the desperation of knock-out football can do to a team.

"Generally in these situations there's always a bit of madness around, a bit of chaos at some stage," Mowbray told BBC Radio Newcastle.

"It's when you activate that really. There's no real need for them to activate it from the start. The way they play is pretty dynamic as it is.

"They could ask questions of us, and if they get a goal the crowd will be right up for it, they'll be believing they're going to get a winner.

"We'll see what comes, but we have to be ready from the first whistle for the intensity of the game."

Image source, Reuters

The setting for tonight's semi-final is as unique a football stadium as you're likely to find in the English professional game.

Read more about how Luton's locals have taken Kenilworth Road to their hearts and the club's plans to build a new stadium.

Image source, Reuters

Luton's homely Kenilworth Road may lack the vast, towering concrete stands and endless rows of seats of the Stadium of Light, but its compactness brings an intimately special atmosphere of its own.

Manager Rob Edwards has called on the Hatters' faithful to recreate the wall of sound which helped Sunderland over the line on their home turf on Saturday.

Luton packed out Kenilworth Road for the play-off against Huddersfield last season, and will do so again tonight.

"We can do noise at Kenilworth Road and we're going to need to, we need to bring that," Edwards told BBC Three Counties Radio.

"They [the Sunderland fans] were well up for it, and I know our lot will be up for it on Tuesday.

"It's half-time, I have to stress that. We're right in the game, everyone knows that. It's 2-1 with 90 minutes at least of football to go.

"We need everyone behind us for the whole duration of the game and the lads will give us everything - we know that."

Image source, Rex Features

Both Luton and Sunderland are unchanged in terms of their starting XIs for this one.

The Hatters no doubt feel they can get a better response from their personnel, while Sunderland don't have much choice!

Luton have made a change to the bench though, with Joe Taylor coming in for Luke Freeman.

Sunderland welcome back Aji Alese among the subs after injury, though whether he'll be risked will no doubt depend on the score. He replaces Ellis Taylor.

Luton: Horvath, Bell, Lockyer, Osho, Drameh, Clark, Nakamba, Mpanzu, Doughty, Adebayo, Morris.

Subs: Shea, Pitts, Berry, Burke, Campbell, Onyedinma, Taylor.

Sunderland: Patterson, Gooch, Hume, O'Nien, Roberts, Neil, Ekwah, Clarke, Amad, Gelhardt.

Subs: Bass, Huggins, Ba, Alese, Lihadji, Michut, Anderson.

Ninety minutes to get it sorted.

Kenilworth Road will rock in its intimate way. Luton's stronghold is tight, compact, suffocating for opponents when it's not going well. The Hatters know it to the very last blade of grass.

Sunderland will have their away support too, but in relation to capacity, it won't be the 6,000 that followed them to Preston on the final day, nor grounds all over the country this season.

Outnumbered but, they'll hope, not outsung.

The atmosphere will be massive. The game will be massive. The outcome will be massive. Let's get it on.

The task is clear. The reward is great. First carrot: a trip to Wembley.

Luton must win. They trail from the first leg at the Stadium of Light. If it's 1-0, they keep it alive for extra time and penalties, likewise if they match Sunderland's first leg lead. Anything better than a win by a one-goal margin and they're through.

Sunderland have a dreadful record in the play-offs but last season's triumph in League One has wiped the slate clean. They, like Luton, are impressive on the road. They just need to avoid defeat to progress. Easier said than done.