Messi is sent off! It's a dismal end to the Supercopa for Messi who lashes out and strikes Molina off the ball and - after check with VAR - he's shown a red card.
118'
Lekue leads a two-on-one counter-attack for Bilbao but his cross is brilliantly cut out by Araujo and Barcelona survive.
116'
Another chance arrives and fades for Barcelona as Messi's corner is met by a header from Araujo which loops over the bar.
114'
Jordi Alba gets yellow.
Alba is booked after crashing into Dani Garcia on the halfway line.
This has been a thrilling period of extra time! Usually, both teams spend this time composing themselves for penalties; however, Williams' goal has forced Barcelona into hurling everyone forward to attack and it's resulted in breathless, end-to-end football!
110'
Jon Morcillo gets yellow.
Morcillo delays the free-kick and is booked for timewasting.
109'
Asier Villalibre gets yellow.
Molina is booked for a late challenge on Puig, presenting Barcelona with a crossing opportunity.
106'
Athletic get the second half of extra time underway.
105' +3
HALF TIME IN ET: Barcelona 2-3 Athletic Bilbao
105'
Jon Morcillo enters the game and replaces I. Williams.
Trincão enters the game and replaces C. Lenglet.
Williams is replaced by Morcillo as Athletic look to secure their grasp on the Supercopa.
Barcelona are going for it; the defender Lenglet, is replaced by an attacker in Trincao.
Minute
Description
102'
The introduction of Puig has given Barcelona real impetus in the final third; they're now zipping the ball from side to side as they look to open Athletic up.
99'
Braithwaite fires an effort from the edge of the box, but it goes straight at Simon.
97'
Riqui Puig enters the game and replaces Sergio Busquets.
These last 10 minutes have been quite a shock for Barcelona! First, they surrendered their lead in stoppage time and now Williams has put them behind in extra time with an inspired effort; it's going to be incredibly tough for Barcelona to respond now.
Barcelona respond by replacing Busquets with Puig in midfield.
95'
Unai Núñez enters the game and replaces Iñigo Martínez.
Athletic immediately replace Martinez with Nunez in defence.
93'
I. Williams has scored a goal for Athletic Bilbao! Assist by Muniain.
STUNNING FROM WILLIAMS! 3-2 ATHLETIC BILBAO! What a way to put your side ahead in extra time! Williams receives a pass on the edge of the area and proceeds to jag inside Mingueza before bending a swerving effort across Ter Stegen and into the top corner!
Well, that was a thrilling end to the 90 minutes! Barcelona were all set to win the Supercopa and had even substituted Pedri and Dembele to slow the game down, but now find themselves facing extra time following Molina's dramatic late goal.
It was Muniain who played the pass into Williams, but surely even he didn't expect the explosive strike that followed!
91'
Barcelona get the first half of extra time underway.
90' +1
Three minutes of stoppage time are added.
90'
Asier Villalibre has scored a goal for Athletic Bilbao! Assist by Muniain.
Muniain had an earlier assist from a free-kick ruled out by VAR, but this time Molina is onside and the goal stands!
MOLINA EQUALISES! 2-2! Athletic drag themselves level in the final moments as Molina latches onto Muniain's free-kick by stabbing the delivery into the roof of the net from close range!
88'
M. Pjanić enters the game and replaces Pedri.
M. Braithwaite enters the game and replaces O. Dembélé.
Pedri departs with Pjanic coming on.
Barcelona slow the game down with a double change themselves. first, Dembele makes way for Braithwaite.
87'
Athletic are throwing everything at Barcelona now as a frenetic move ends with Williams glancing a header over the bar.
83'
Asier Villalibre enters the game and replaces Raúl García.
Lekue enters the game and replaces Balenziaga.
Berenguer almost makes an immediate impact, as he races towards the byline before standing up a cross that Lenglet hacks clear.
Balenziaga departs with Lekue taking his place.
Athletic make another double switch; Raul Garcia is replaced by Molina up top.
81'
Mikel Vesga enters the game and replaces Unai Vencedor.
Álex Berenguer enters the game and replaces Capa.
Athletic respond to going behind with a double substitution: first up - Capa makes way for Berenguer.
Vencedor is replaced by Vesga in midfield.
79'
Well, it's frustrating for Bilbao who have restricted Barcelona well today. But, suddenly, they need to rescue this final with a late equaliser.
77'
A. Griezmann has scored a goal for Barcelona! Assist by Jordi Alba.
Alba has been the key to unlocking Bilbao twice today. He follows up his earlier cross that set up the opener, with a precise, drilled pass into Griezmann to restore the lead!
GRIEZMANN AGAIN! 2-1! Brilliant move from Barcelona; Dembele and Alba play a sharp one-two, allowing the latter to race towards the byline before drilling in a low cross that Griezmann steers in from close range!
74'
Dembele presses Capa and dispossesses the defender, but his resulting throughball towards Messi is too powerful and Simon gathers.
70'
Dembele has had an extremely quiet game and his frustration continues as his surging run into the box is expertly halted by Balenziaga.
67'
Dani García gets yellow.
Dani Garcia is booked after catching De Jong with a lunging slide tackle from behind.
65'
Barcelona enjoy a long spell of possession as they struggle to break Athletic down.
63'
Griezmann beats Balenziaga to swing in a cross from the right, but Yeray anticipates the danger and heads it clear.
59'
Well, that would have been a huge moment for Bilbao - by taking the lead with 30 minutes to go they'd have been in with a strong chance of holding on to win the trophy. Nevertheless, the deadlock remains.
55'
Barcelona are controlling proceedings currently, but they still look vulnerable on the break. Williams is hanging in line with Araujo and Lenglet and Athletic are looking to play him in behind and expose Barcelona frequently.
53'
Messi attempts to curl a free-kick at goal from 30 yards, but it bounces a few yards wide.
51'
Dani Garcia lets fly from 30 yards, but his effort skews high and wide.
49'
Mingueza makes his presence known early by barging over Dani Garcia near the halfway line.
47'
Messi immediately wins a free-kick in a dangerous area after a cynical foul from Capa. He steps up to whip it in himself, but the cross is batted away by Martinez at the near post.
46'
Óscar Mingueza enters the game and replaces S. Dest.
Dest is replaced by Mingueza at half time.
Athletic get the second 45 under way.
45' +1
HALF TIME: Barcelona 1-1 Athletic Bilbao
44'
Raul Garcia rises to meet a cross from Capa but his header floats over.
42'
De Marcos has scored a goal for Athletic Bilbao! Assist by I. Williams.
DE MARCOS! ATHLETIC EQUALISE IMMEDIATELY! 1-1! Williams scoops a deft, curling pass over Alba and into the path of De Marcos, who races onto the throughball to stab a smart finish beyond Ter Stegen!
That was a stunning throughball from Williams! To spot the run of De Marcos was inventive, but to execute a spinning chip over the Barcelona defence was magnificent!
40'
A. Griezmann has scored a goal for Barcelona!
GRIEZMANN! 1-0! Messi unlocks the Bilbao defence with an incisive throughball into Alba and the defender cuts it back to Messi, whose shot from 12 yards is deflected into the path of Griezmann who drills it into the bottom corner!
39'
De Marcos floats in a cross towards the front post and Raul Garcia gets there first to awkwardly nod it well wide, under pressure from Araujo.
34'
Griezmann skips past Capa and feeds a pass to De Jong as Barcelona look to kickstart a counter-attack, but De Jong wastefully fails to control it and Bilbao regain possession.
32'
After a nervy opening 20 minutes, both teams are finally starting to hunt a crucial goal with more intent.
30'
Messi peels out to the right wing and beats Balenziaga, before whipping in a cross that narrowly evades the run of the unmarked Griezmann.
26'
Chance for Araujo! Messi curls in a free-kick from deep and Araujo gets there in front of his marker only to kick air, allowing Simon to gather.
22'
Muniain whips in the resulting set-piece, but it's cleared at the second attempt.
21'
Vencedor slips Williams in down the left channel and - although Lenglet and Dest rush over to crowd him - the attacker manages to win a corner.
17'
Balenziaga combines well with Muniain before clipping in a cross from the byline that Araujo comfortably clears.
15'
Messi jinks through the Bilbao midfield before attempting a curling throughball towards Griezmann, but Capa stretches to cut it out.
13'
Raul Garcia anticipates Williams' flicked header and for a moment it looks as though he'll be clean through on goal! However, the attack is quickly halted by an offside flag against Williams.
11'
C. Lenglet gets yellow.
Lenglet is booked for a cynical trip that prevented Williams from latching onto Muniain's throughball.
9'
Athletic have started the game with the greater intensity, but so far it's been a tight game without any shooting opportunities.
7'
Barcelona make their first real foray forward, but a flowing move comes to an end as Dembele is caught marginally offside.
5'
Athletic continue to make a promising start, as Lenglet is forced into hacking De Marcos' devious cross away for a throw-in.
3'
Williams immediately skips past Araujo down the left flank, but Dest races back to dispossess the attacker.
1'
Barcelona get the final underway.
Bilbao, meanwhile, are in the final after edging a 2-1 victory over Real Madrid in the semi-final.
Hello and welcome to live commentary of the Supercopa de Espana final between Barcelona and Athletic Bilbao. Barcelona qualified today by defeating Real Sociedad on penalties, and they’ll be looking for a morale-boosting trophy after a disappointing league and European campaign last season.
SUBS: Samuel Umtiti, Inaki Pena, Miralem Pjanic, Riqui Puig, Oscar Mingueza, Trincao, Neto, Junior Firpo, Martin Braithwaite.
BARCELONA (4-3-3): Marc-Andre ter Stegen; Sergino Dest, Ronald Araujo, Clement Lenglet, Jordi Alba; Frenkie de Jong, Sergio Busquets, Pedri; Ousmane Dembele, Lionel Messi, Antoine Griezmann.
SUBS: Alex Berenguer, Ibai Gomez, Jon Morcillo, Asier Villalibre, Jokin Ezkieta, Oihan Sancet, Unai Nunez, Inigo Lekue, Mikel Vesga.
ATHLETIC BILBAO (4-4-2): Unai Simon; Ander Capa, Yeray Alvarez, Inigo Martinez, Mikel Balenziaga; Oscar De Marcos, Dani Garcia, Unai Vencedor, Iker Muniain; Raul Garcia, Inaki Williams.
The players are emerging from the tunnel and kick off is just seconds away!
Now that both sides have a goal though, you'd expect the second half to be played with much more fluency.
The whistle blows for the end of 90 minutes and we head onto extra time.
That's all for now though, goodbye!
The victory means that Bilbao win their first Supercopa since 2015 - which was also against Barcelona!
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