Get Involvedpublished at 19:58 British Summer Time 15 April 2017
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Samson S Isah: Real Madrid is going to win this league. Barca has always messed up when it matters this season
Barca are now three points off leaders Real Madrid
El Clasico next weekend
Messi smashes in stunning Barca opener, scuffs second in, Alcacer get the third
Umtiti own goal and Prieto effort gives Sociedad hope
Emlyn Begley
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Samson S Isah: Real Madrid is going to win this league. Barca has always messed up when it matters this season
Lionel Messi plays the ball through to Paco Alcacer but Geronimo Rulli comes flying off his line to deny the Barca striker, and Sergi Roberto takes a poor first touch from the rebound and the chance is gone.
Real Sociedad defender Yuri Berchiche thinks he's living in some kind of dreamland. The ball bounces up to him 25 yards out and he has an ambitious go which flies over the crossbar. He was never going to score that.
Real Sociedad winger Carlos Vela, not exactly known as a hard man, crunches Paco Alcacer with a dangerous tackle. The first booking of the game.
A great chance from Barcelona but Luis Suarez slips. Lionel Messi plays a great ball out left to Jordi Alba but his cross is behind Suarez and the Uruguayan falls over while trying to adjust his body to it.
Had Alba got the cross right, Suarez would have had a six-yard tap-in.
Barca come forward and Lionel Messi tries to slip in Luis Suarez, but Real Sociedad clear their lines.
An early chance for Real Sociedad as Willian Jose flicks the ball onto Yuri Berchiche, whose 16-yard shot is blocked by Gerard Pique near the goalline.
Real Sociedad get us under way.
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John McEnerney: Barcelona won't catch them, Real Madrid showed they just win games even when they play muck. Barcelona can't do that, with them it's all or nothing
Do you agree with John? Is the title race over? Let us know your thoughts using #bbceurofooty on Twitter.
Unlike Real Madrid earlier, Barcelona aren't thinking about the Champions League and name their strongest team. Neymar is suspended.
Barcelona: Ter Stegen, Roberto, Pique, Umtiti, Alba, Busquets, Rakitic, Gomes, Messi, L Suarez, Alcacer. Subs: Cillessen, D Suarez, Iniesta, Digne, Mathieu, Alena, Cardona.
Real Sociedad: Rulli, Zaldua, Navas, Inigo, Yuri, Illarra, Zurutuza, Prieto, Vela, Willian Jose, Oyarzabal. Subs: Ramirez, Granero, Aritz, Canales, Bautista, Zubeldia, Rodrigues.
Barcelona are now six points behind Real Madrid, who will have a game in hand after this match.
They face each other at the Bernabeu next Sunday.
Surely Barca now have to win their last seven games (including El Clasico) and hope Real slip up in another game.
A lot can change in a short amount of time in football.
In the 58th minute of Real Madrid's game against Sporting Gijon earlier today, Barcelona actually had their title fate in their own hands.
In the 89th minute, they were four points below Real.
But after Isco's last-minute winner, Barcelona trail leaders Real by six points - having played an equal amount of games.