First-half goals sealed victory for Barcelona at the Camp Nou. Real Sociedad were better in the second half, but Alcacer's goal and Messi's double were enough to overcome Umtiti's own goal and a beauty from Prieto.
Barcelona v Real Sociedad - As it happened
The end
First-half goals sealed victory for Barcelona at the Camp Nou. Real Sociedad were better in the second half, but Alcacer's goal and Messi's double were enough to overcome Umtiti's own goal and a beauty from Prieto.
What a chance Suarez!
He was through on goal against Rulli, but the keeper saved well.
Yuri over the bar!
A good chance for Real Sociedad to equalise, but the left-back missed.
3 added minutes
Real Sociedad knocking the ball around well
Yellow card Pique
Penalty claims at the Camp Nou
A great run into the box from Messi and he is nudged off the ball. It did not look like a foul...
Zurutuza off for Granero
Chance Barcelona!
Rakitic with a surging run down the middle, but his shot is easy for Rulli to gather.
Alcacer is replaced by Denis Suarez
Bautista replaces Willian Jose
Real Sociedad seek an equaliser
The visitors have 51% of possession and are bossing the game, but have not managed to score.
Real Sociedad close!
First, Illarramendi tried to surprise Ter Stegen with a long shot which the keeper palmed over the bar. In the following corner Martinez headed wide.
20 minutes to go
Iniesta has come on to try and win back possession. Real Sociedad have been the better side in the second half.
Iniesta on for Andre Gomes
Luis Suarez yellow card
Real Sociedad pressing
Barcelona have completely lost the midfield and the defence is struggling to cope with attacks from the away team.
Canales on for Vela
Still an open game at the Camp Nou
Real Sociedad defending and attacking equally well. Barcelona still have not ensure a win here.
Yellow card Illarramendi
Barca get the ball rolling!
We're back!
The players are back out and no substitutions for the second forty-five minutes.
Half time
An entertaining first half which leaves not much to say about both teams' defending. Barcelona lead after a brace from Messi and another from Alcacer. Real Sociedad have managed to stay close behind after an Umtiti own goal and a great goal from Xabi Prieto.
Real Sociedad goal!
What a crazy end to the first half. Willian Jose with a great ball into the box and Xabi Prieto side-foots past Ter Stegen. Real Sociedad restore the one-goal deficit.
GOAL!
Barcelona get a third!
Barcelona reclaim their two-goal lead. Messi fed the ball to Alcacer who finished well into the bottom corner.
GOAL!
Real Sociedad get a goal!
Real Sociedad cut one back. Woeful defending from Barcelona to allow Martinez to turn around in the box and blast the ball across for the ball to bounce in off Umtiti. It should go down as an own goal from the defender.
GOAL!
Yellow card Alcacer
The striker pulled down Carlos Vela.
Barcelona double their lead
The second for Messi. A poacher's goal after picking up the rebound from Suarez's shot to almost inadvertently finish into an open net.
GOAL!
Barcelona look for a second
The home side moving the ball around well. It could be two after the chance missed by Alcacer, but Real Sociedad have also created some danger.
What a miss from Alcacer!
Roberto with the low cross for the striker who was unmarked, and he completely scuffed the shot.
Barca lead!
Who else? Messi scores for the home side. 25 yards out, Suarez saw Messi in space, and the Argentine's flashed straight into the bottom corner.
GOAL!
Real Sociedad close!
Open game in the first minutes. Now it is Oyarzabal inside the box who is in space, but Ter Stegen saves his shot. If he shoots either way of the keeper it is a definite goal.
Chance Barcelona!
A great through ball from Messi sets Alcacer free, but Rulli does well and palms the ball for a corner kick.
Yellow card Carlos Vela
A strong challenge on Alcacer. He got the ball but his studs also came into contact with the striker's shin.
Chance Real Sociedad!
Oyarzabal volleyed towards goal and Pique blocked a ball that was on its way in. The visitors look brave holding a high line and trying to move the ball around well.
Real Sociedad get us underway!
Everything ready at the Camp Nou!
The players emerge from the tunnel.
Live updates of this La Liga matchweek 32 clash between Barcelona and Real Sociedad at the Camp Nou.
Real Madrid won earlier today taking them six points clear at the top, and bringing them closer to the title if Barcelona fail to win today. Enrique will expect his team to forget about the Champions League and focus solely on the domestic competition to avoid an upset at home.
Lineups for today's match:
Real Sociedad: Rulli, Illara, Martinez, Prieto, Vela, Willian, Zurutuza, Oyarzabal, Yuri, Zaluda, Navas
Subs: Ramirez, Granero, Artiz, Canales, Bautista, Zubeldia, Rodrigues
Barcelona: Ter Stegen, Piqué, Rakitic, Sergio, Alcácer, Jordi Alba, S.Roberto, A.Gomes, Umtiti, Suárez, Messi
Subs: Cillessen, Denis, A.Iniesta, Digne, Mathieu, Aleñá, Cardona