Barcelona are 28-time Copa del Rey winners
Sociedad last won Copa del Rey in 1987
Joining Barcelona in Friday's semi-final draw are Atletico Madrid, Alaves and Celta Vigo.
We'll have news of the draw on the BBC Sport website. Many thanks for your company. Until next time.
Barcelona win 6-2 on aggregate
Holders Barcelona reach the Copa del Rey semi-final...again.
Barcelona 5-2 Real Sociedad
You have to feel sorry for Sociedad. Despite the 6-2 aggregate scoreline, they've actually given Barca a decent game but have been undone by some exquisite finishing.
Barcelona 5-2 Real Sociedad
Remember the name! Denis Suarez has come a long way since leaving Manchester City for Barcelona B in 2013. He's produced two wonderful finishes his namesake Luis would be proud of.
Denis Suarez
Past one defender, then another and then round the keeper before walking the ball into the net. Is that Messi? No, it's Denis Suarez. Goal of the night.
Image source, Getty ImagesArda Turan
Talk about making an impact. Substitute Arda Turan makes it 5-2 on aggregate as he slides a cutback home at the back post. That's some celebration too. He kisses the badge on his shirt before punching the air. The fans love it.
Image source, Getty ImagesBarcelona 3-2 Real Sociedad
Arda Turan is on for the closing stages. He's on for Neymar.
Barcelona 3-2 Real Sociedad
The last team to score two against Barca at the Nou Camp? Alaves in September.
Willian Jose
The Nou Camp falls silent. Willian Jose rises between two Barca defenders and beats Japer Cillessen with a well placed header.
Sociedad just won't go away. Barca lead 4-2 on aggregate but the visitors are playing some terrific stuff in the closing stages.
Barcelona 3-1 Real Sociedad
Javier Mascherano's night is over. He's replaced by Ivan Rakitic. Barca are in total control. There's not going to be an upset here.
Barcelona 3-1 Real Sociedad
Barca are back in action in little over 60 hours time when they are away to Real Betis on Sunday (11:00 GMT). Time for Luis Enrique to rest some legs?
Luis Suarez
Instant response by Barca. Lionel Messi threads the ball through to Luis Suarez who restores his side's two-goal lead with a composed finish. The hosts lead 4-1 on aggregate. Surely that's the end of Sociedad?
Image source, Getty ImagesJuanmi
A Sociedad comeback? Substitute Juanmi makes an instant impact as he lifts the ball over the head of Japser Cillessen while under pressure from two Barca defenders. That's a wonderful finish.
Barcelona 2-0 Real Sociedad
Moments before the penalty, Real Sociedad wasted a glorious chance to equalise when Willian Jose was denied by a fantastic save by Jasper Cillessen. A huge turning point in the game.
Lionel Messi (penalty)
All over. Lionel Messi sends Barca 3-0 ahead on aggregate. Luis Enrique's side are all but in Friday's semi-final draw.
Image source, ReutersBarcelona 1-0 Real Sociedad
A bad tempered match gets even uglier as Inigo Martínez sends Neymar sprawling after the Brazilian had gone clear and cut inside the area. Clear cut.
Barcelona 1-0 Real Sociedad
Luis Suarez is in a tetchy mood. There's been four bookings already in what is a niggly tie and Suarez is arguing with the referee about another decision. He needs to be careful. Barca are in control of this tie but they cannot afford to go down to 10 men.
Barcelona 1-0 Real Sociedad
Barcelona 1-0 Real Sociedad
Sergi Roberto took a knock in the first half. He battled on to the interval but he's been replaced by Aleix Vidal.
Barcelona 1-0 Real Sociedad
We're back under way and Barca have made a change.