Pierre-Emerick Aubameyang has scored seven goals in his first six La Liga away appearances for Barcelona - only Romario (7 in 1993-94) scored as many in his first six top flight away fixtures for Barca.

Sociedad win a corner which is delivered into the mix by Adnan Januzaj but it's cleared comfortably.

The hosts have hardly tested Marc-Andre ter Stegen.

They're still dazed after conceding for the first time in eight home La Liga games.

The biggest surprise so far is that the referee has kept his cards in his pocket. There's some been some meaty challenges from both sides.

Barca are putting in the hard yards. Sociedad are trying to respond after going behind and are enjoying a big chunk of possession but Barca are working tirelessly off the ball to frustrate them.

Pierre-Emerick Aubameyang has scored three of his last four La Liga goals through headers. He has only netted more headed league goals in 2016-17 (6 for Borussia Dortmund) and 2015-16 (4 for Dortmund) than for Barca this season.

Sociedad started well on the front foot but that goal has really knocked them.

A word for 17-year-old midfielder Gavi. He was heavily involved in the goal after doing well to win possession after Ousmane Dembele's shot came back off the post.

Nine goals in 11 La Liga games for Pierre-Emerick Aubameyang.

Not bad for a free signing.

Barca's uncomfortable start continues.

Alexander Isak is on the prowl and tries to fizz a pass across the six-yard line but it is cut out by Gerard Pique.

That was a timely interception.

The tackles are flying in. Sergio Busquets has been chopped down in full flight and the referee is telling both sets of players to calm it down.

That was close!

Marc-Andre ter Stegen receives a back-pass and takes too long to get rid of it and is almost caught out by Alexander Isak.

That's got the home fans out of their seats.

Early touches for both keepers but no saves. Ferran Torres wins a free-kick after Igor Zubeldia flies in from behind. Barca are playing a high press while Real have just won the game's first corner.

Under way in San Sebastian.

This is going to start slightly late.

It is the 150th La Liga match between Barcelona and Real Sociedad.

Barca have won 85 of the previous 149 encounters, Real Sociedad 32 and there were 32 draws.

Barca scored 299 goals in these matches, Sociedad 152.

What a noise!

Blue and white scarves everywhere as the teams emerge from the tunnel.

Buckle up. This has all the makings of being a cracker.

Image source, Rex Features

Real Sociedad have not played in the Champions League since 2013 when they finished with one point from six games in a group that included Manchester United.

Sociedad will climb above Real Betis into fifth spot and within two points of a Champions League spot if they secure a first win over Barcelona in six years.

Image source, Reuters

Anyone booked a couple of nights away in Madrid next weekend?

There could be a huge party in Spain's capital.

If Barcelona do not beat Real Sociedad, Real Madrid will be crowned champions if they defeat Espanyol at the Bernabeu Stadium on 30 April.

Image source, Reuters

This is a tough test for Barca.

Real Sociedad are unbeaten in their past five league games while they have gone seven matches without conceding at home in La Liga.

In addition, the home fans in the Reale Arena are whipping up a terrific noise.

Barcelona

Barcelona lost their most recent La Liga match 1-0 at home against Cadiz. They can fail to score in successive La Liga fixtures for the first time since April 2008 under Frank Rijkaard (2 matches).

Real Sociedad (19) have kept the most clean sheets among all teams in Europe's top five domestic leagues this season.

This game is taking place in San Sebastian in the Basque Country.

No wonder David Moyes described it as a beautiful part of the world when he was in charge of Sociedad.

Image source, Getty Images

Image source, Getty Images

Image source, Getty Images