Barca lead 1-0 after an entertaining first half at Balaidos. Suarez got the goal from a gorgeous disguised Messi free-kick, while another set-piece from the same man saw Pique hit the crossbar. Messi was wasteful when granted an opportunity late in the half, though, while Ter Stegen and the goal frame have also been worked at the other end.
45' + 3' HALF-TIME: Celta Vigo 0-1 Barcelona
45' + 3' Messi delivers a corner, which Blanco scrambles to punch clear on his goal line. The ball breaks to the edge of the area, where Puig thumps in a shot. Celta get bodies in front of the ball, though, and can clear.
45' + 2' Semedo does well to keep the ball in on the right flank and then gets to the byline to win a corner. Barca have one final opportunity to add to their first-half lead.
45' + 1' There will be a minimum of two minutes of added time.
45' Barca's slightly lax defending suggests they might yet need a second, and Fati attempts to provide it. He dashes to the byline but drives a low cross straight across the face of goal.
43' Big opportunity to counter squandered now! Aspas steals away on halfway and Celta are two on one against Pique. But Aspas gets his feet in a muddle and, when Pique stalls the striker, Vidal gets back to make a vital tackle.
42' Celta are now sitting so deep, seemingly attempting to get to half-time just the one goal down as Barca probe.
40' CHANCE! Messi misses! Incredible! The forward steals possession and then bears down on goal, working space on the edge of the area and looking to shape a shot into the top-left corner. One goal shy of 700 in his career, Messi uncharacteristically gets the finish wrong, missing the target entirely.
38' The drinks break has really worked in Barca's favour. They were struggling a little prior to that but are now back in complete control, with Celta hurrying clearances and unable to retain possession.
36' Barca have had two chances and scored from set-pieces, but they strangely seem reluctant to get the ball in the box at times. Their latest corner goes short and comes to nothing.
35' BLOCK! Araujo prevents what appears to be a certain goal! Messi shifts the ball right inside the area to send Fati through on goal, but the defender intervenes just as he gets his shot off, sending the deflected attempt looping over the top.
33' Puig does really well to keep a Barca attack alive after Alba's poor touch, the ball eventually arriving with Messi and then Vidal on the edge of the area. Vidal drags a long way wide, though.
32' The game gets under way as Denis Suarez complains to the referee about an earlier decision. The midfielder is shoved playfully by namesake and former team-mate Luis Suarez, prompting a hug between the pair.
31' The visitors can now regroup, with a drinks break allowing Setien to address his players.
30' Barca are struggling to regain their fluency at the moment. Rakitic attempts an ambitious cross towards Luis Suarez, but the ball bounces behind.
29' Celta have really stepped up a gear since falling behind. They are even pressing higher up the pitch, almost forcing Puig into an error on this occasion but instead conceding a foul.
26' Barca take a moment to recover some composure and some territory after a testing couple of minutes. Dominant until the goal, they have been on the back foot since.
24' SAVE! Oh so close! Celta have Barca reeling now! Denis Suarez plays a gorgeous pass into the area for Mendez to get his shot away, only for Ter Stegen to get the slightest touch to turn the ball onto the post. Umtiti cannot clear, so Aspas hammers in a shot from a tight angle which Ter Stegen smartly saves again. Good goalkeeping.
23' Barca just about deal with the corner, but this is exactly the sort of response Celta would have hoped for. They come forward again.
22' CHANCE! Now Barca are scrambling! Ter Stegen's pass is cut out, but a slipping Smolov cannot hit the target. The ball instead bounces to Aspas, yet the goalkeeper recovers to block.
19' Big chance for Barca now. Vidal goes down five yards outside the Celta box, giving Messi an opportunity to shoot on goal.
18' There appears no end to Barca's dominance. Messi is smartly tackled, but Aspas is likewise quickly reeled in by Umtiti, a counter halted.
17' Magic from Messi! He lifts a gorgeous outside-of-the-boot pass in behind to Semedo, who squares as Blanco advances inside the area. Neither Luis Suarez nor Vidal can get a touch to turn the ball in, though, as Celta clear.
16' It looks like opportunities to attack will be few and far between for Celta today. Aspas cannot direct a long ball goalwards with any power.
14' Barca have their fourth corner already as Vazquez stoops to head Semedo's cross behind. The visitors go short this time, but Celta still look shaky, a low cross causing more problems than it really should. Messi cannot then find a route through, though.
12' Barca are happy to keep the ball but also have players capable of driving through the Celta defence, as Luis Suarez now attempts to do just inside the area. Aidoo, who has made a solid start, steps in.
10' SCRAMBLE! Celta look so vulnerable from these Messi set-pieces! A gorgeous corner, won from a deflected pass, drops right in front of Blanco, who cannot gather under pressure from Luis Suarez. The striker steps out of the way, yet no team-mate can prod into the net, Vidal ultimately instead teeing up Puig, who drags well wide.
9' Despite a brief foray, Celta are still struggling to gain a foothold in the game. Aspas goes down in an aeriel duel with Umtiti, but no foul is given and Barca can build from the back.
8' Celta go short from their corner, but Aspas cannot get past Semedo on the right, giving up possession and allowing Fati to break. His switch towards Luis Suarez is wayward, however.
7' Barca keep looking to get the ball into the box, but Celta finally clear and win a free-kick. They then attack through Smolov down the left, but his shot is deflected wide by Umtiti.
6' CROSSBAR! Pique comes so close to the opener! Messi drives in a flat corner from the right, allowing Pique to get across his man and head goalwards from close range. Blanco is beaten, but the ball bounces away off the crossbar.
6' Messi delivers the set-piece, yet his ball is low and does not reach Pique at the near post, a defender instead nodding behind for a corner.
5' Semedo wins a free-kick in a promising position down the right, with Denis Suarez tugging the full-back before a team-mate stepped in.
4' It's all Barca, with a home defender forced to hack clear when Alba combines with Puig and crosses from the left. Barca build again.
2' A nervy moment for Celta! Fati tears away from his marker on the left and gets into the area before going down until light contact. The hosts clear and no foul is given.
2' The visitors are able to maintain possession for the opening 90 seconds, although Celta are pressing hard. Vazquez wins their first touch, intercepting a Rakitic switch.
1' KICK-OFF: Barca get us up and running!
Celta have won three of their past four home league matches against Barca, drawing the other, and scored an average of three goals per game in this run.
Barca make four changes, including a first league start of the season for 20-year-old midfielder Puig, with Sergio Busquets suspended. Celta's Denis Suarez starts against his former club, while Rafinha - still on loan from Barca - is among the ex-Camp Nou contingent on the bench.
Subs: Neto, Inaki Pena, Arthur, Clement Lenglet, Antoine Griezmann, Martin Braithwaite, Junior Firpo, Alex Collado, Ronald Araujo, Dani Morer, Monchu, Jorge Cuenca.
Barcelona (4-3-3): Marc-Andre ter Stegen; Nelson Semedo, Gerard Pique, Samuel Umtiti, Jordi Alba; Arturo Vidal, Ivan Rakitic, Riqui Puig; Lionel Messi, Luis Suarez, Ansu Fati.
Subs: Ivan Villar, Nolito, Juan Hernandez, Rafinha, Filip Bradaric, Gabriel Fernandez, Jeison Murillo, Santi Mina, Pape Cheikh, Sergio Bermejo, Jose Manuel Fontan, Dragan Rosic.
Celta Vigo (3-5-2): Ruben Blanco; Joseph Aidoo, Jorge Saenz, Nestor Araujo; Kevin Vazquez, Brais Mendez, Okay Yokuslu, Denis Suarez, Jacobo Gonzalez; Iago Aspas, Fedor Smolov.
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Failure to secure victory against struggling Celta would represent a huge blow for the Blaugrana, however. They face Atletico Madrid and then Villarreal next week, two significant tests.
With seven games of the season remaining, Barca are level on points with rivals Real Madrid at the top of the table but trail due to their inferior head-to-head record. Madrid do not play until tomorrow - at Espanyol - giving Quique Setien's side the opportunity to pile on the pressure here.
Hello and welcome to our live text commentary of today's LaLiga clash between Celta Vigo and Barcelona!