Good evening and welcome to Sports Mole's live text coverage of the La Liga clash between Leganes and Barcelona at the Estadio Municipal de Butarque.
This match pits bottom against top in the Spanish top flight, with Leganes beginning just their third season as a La Liga team in woeful form.
Barca, by contrast, lead the way after five games of the campaign, although they dropped their first points of the season at home to Girona last time out.
Make sure you don't miss a moment of the action courtesy of our minute-by-minute updates below.
This match pits bottom against top, so unsurprisingly Barcelona are heavy favourites to return to winning ways after seeing their perfect start come to an end at the weekend. Leganes are still searching for their first victory of the campaign, but have upset the odds on a number of occasions during their relatively short stint in the top flight so far.
We will have a close look at both teams in a little while, but first let's check out the team news...
Well, we'll start with the visitors - sorry Leganes, but those are the sorts of perks the defending champions get - and as expected manager Ernesto Valverde has made a number of changes for tonight's midweek match.
Six, to be precise, and only one of those is enforced with Clement Lenglet missing out due to suspension after his appeal against the controversial VAR-reviewed red card he received at the weekend was turned down. The centre-back only has a one-game ban, though, so will be available again at the weekend.
There are changes either side of them, though, with Alba and Semedo both dropping to the bench in favour of Sergi Roberto and the lesser-spotted Thomas Vermaelen, who gets a rare runout on the left flank this evening.
There is also a notable inclusion on the bench, with summer signing Malcom back in the squad following an injury which was meant to keep him out for just a week, but in the end took closer to three to recover from.
Messi has eight goals in seven appearances across all competitions this season - including four in his last two - and may have a point to prove after being omitted from the final three of the main award at Monday's The Best awards.
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The French winger suffered an injury-plagued debut campaign at the Camp Nou, but already has more goals this season than he did last having found the back of the net five times in his seven outings.
Manager Mauricio Pellegrino is expected to play with five at the back and another four screening them in midfield, with Youssef En-Nesyri the man looking to lead the line with what possession Leganes might enjoy.
Elsewhere in midfield the likes of Vesga and Oscar Rodriguez come into the side, with one-time West Ham target Diego Rolan and Southampton loanee Guido Carrillo amongst those to miss out.
Juanfran will drop back into a deeper role on the right flank, while Jonathan Silva returns on the opposite flank and Tarin drafted into the centre of defence.
That said, any positive result - or even a positive performance - against the might of Barcelona could be exactly the catalyst they need to kickstart what has been an ominous start to the 2018-19 season.
Tonight's hosts are one of only three teams - alongside Valencia and Real Valladolid - yet to pick up a win in La Liga this season, while only three teams have conceded more than their 10.
Villarreal were also only 1-0 winners in Leganes' last home game, and the only match they have lost by more than one goal this season came at the Bernabeu in a 4-1 defeat to Real Madrid.
Four points was the gap of survival in their debut La Liga campaign, but the 17th-placed finish is a little misleading when it comes to last term as Leganes actually finished a full 14 points clear of relegation.
The former Southampton manager is already coming under some pressure after this dreadful start, although his last spell in Spain saw him lead newly-promoted Alaves to the Copa del Rey final. His reputation was damaged by that unsuccessful nine-month stint at St Mary's, though.
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Indeed, tonight could see them lost four La Liga games in a row for the first time since November - not a bad run without for such a new team on the block - and they could also fail to score in three La Liga games on the bounce for the first time since February.
So far this term they have managed just the one point from their two home outings, though, and including the tail end of last season it is only one win in five La Liga home games following a run of six wins in 10 before that.
Barca have begun the season in good form, dropping only two points from their opening five games, although there is still the feeling that they are yet to get up to full speed this term.
Valverde's side average more than three goals per game in the league so far this term, although half of their 16-goal tally came in one game when they hammered Huesca 8-2.
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Lenglet's red card while Barcelona were leading proved to be a turning point - and one Valverde disagreed with the VAR on - with Cristhian Stuani scoring either side of half time to turn the game on its head before Gerard Pique salvaged a draw to protect Barca's two-year undefeated streak at home in the league.
Indeed, the Spanish champions have incredibly lost just one of their last 50 La Liga games stretching back to April 2017, winning 39 of those.
Tonight could see Barca fail to win two successive games in all competitions for the first time since November 2017, although it would take a major upset from Leganes for that to be the case.
Considering Valverde's side finished 17 points clear of Madrid last year it is perhaps unsurprising that they also boasted the best away record in the entire division, registering the most points (42), most goals (46) and fewest defeats (1).
The Blaugrana face Athletic Bilbao next, and after that the true tests really come with Valencia, Sevilla and Real Madrid - all of whom finished in the top seven last season - in their next three league games. Couple that with Champions League clashes against Spurs and Inter Milan, and it could prove to be a crucial stage of their season.
It is hard to see anything other than a Barcelona win tonight. The only thing Leganes have is home advantage, but they have been in dreadful form this season and may have to go in damage limitation mode from the off.
SPORTS MOLE SAYS: Leganes 0-3 Barcelona
The four matches combined have an aggregate scoreline of 13-3 in Barca's favour, although Leganes have at least managed to score in all but one of their previous meetings with the more illustrious opponents.
Barca's only other previous visit to this stadium saw them run out 5-1 winners, meaning that both of their biggest wins in this fixture have actually come away from home.
Leganes did push them fairly close, though, with El Zhar halving the deficit after a Messi brace and only an 87th-minute hat-trick goal from the Argentine taking the hosts out of sight.
LEGANES STARTING XI: Cuellar; Juanfran, Bustinza, Tarin, Silva; Carnero, Perez, Vesga, El Zhar; Oscar, En-Nesyri
BARCELONA STARTING XI: Ter Stegen; Roberto, Pique, Umtiti, Vermaelen; Rakitic, Busquets, Coutinho; Munir, Messi, Dembele
Messi bursts into life to dart forward past a few blue and white shirts before picking out Coutinho, whose first touch is actually a little wayward as the ball pops up into the air. That allows Coutinho to take on the volley, though, and he fires it into the bottom corner from around 25 yards.
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Will we see a more skillful goal than this tonight?
— Eleven Sports (@ElevenSports_UK) September 26, 2018
Lionel Messi, in his 700th Barca game, the provider, and @Phil_Coutinho with an outstanding volley to make it @CDLeganes 0 - @FCBarcelona 1.#LaLiga #LEGBAR #PureFootball
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BAR!
— Eleven Sports (@ElevenSports_UK) September 26, 2018
And who else but Messi? It has to be written in the stars for him to score tonight, doesn't it?@CDLeganes 0 - @FCBarcelona 1#LaLiga #LegBar #PureFootball
Subscribe here - https://t.co/YbI6T6O8MU pic.twitter.com/fiAalteQzU
Leganes have created some good chances and have more than held their own against the defending champions for long spells, but they have been lacking that telling piece of quality in the final third so far.
The ball chipped up into the air, but Coutinho quickly adapted and fired a fine first-time volley into the corner and beyond the despairing dive of the keeper.
Messi curled one towards the top corner from around 25 yards out and it was almost perfect, but just a little too high as it crashed off the angle of post and crossbar.
The majority of the chances have fallen the way of En-Nesyr, but the closest the hosts have come to a goal came right at the end of the half when Ter Stegen made a flying stop to deny Oscar's curling effort.
Bustinza plays a beauty of a pass out to Silva, who lofts the ball into the box for an unmarked El Zhar, who plants his header into the back of the net!
It is more dreadful defending from Barcelona as Pique just about gets the better of En-Nasyri but then plays the ball straight into the path of Oscar, who fires his first-time finish past Ter Stegen!
Barca are shell-shocked here!
GOAL!
— Eleven Sports (@ElevenSports_UK) September 26, 2018
The equaliser for @CDLeganes_en and Nabil El Zhar, and don't go anywhere - the Leganes second is coming! pic.twitter.com/rwT1MV7A5j
GOAL!
— Eleven Sports (@ElevenSports_UK) September 26, 2018
Bedlam! @3gerardpique won't want to remember this. @oscararnaiz10 picks up the loose clearance, and @CDLeganes lead @FCBarcelona by two goals to one.#LaLiga #LEGBAR #PureFootball
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Coutinho takes the ball down inside the area and tries to whip a trademark finish into the far corner, but Cuellar pulls off a stunning one-handed stop to keep it out. The ball bounces back out to Rakitic, who drills an acrobatic and powerful strike towards the roof of the net on the rebound, but Cuellar recovers to tip it over the bar!
You may not see a better double save this season!
The hosts came from behind to do it too, with goals from El Zhar and Oscar Rodriguez in the space of just 69 seconds cancelling out Coutinho's 12th-minute opener.
A stunning result, and it was a deserved win for the home side too. This will go down as one of the biggest shocks in recent La Liga history.
Thank you very much for joining Sports Mole for tonight's famous result as Leganes pick up their first ever win over Barcelona to leave the first major dent in Barca's title defence. I will leave you with our match report, and be sure to stick around for reaction too.
From me, though, it is goodbye for now!