Good evening and welcome to Eurosport's LIVE coverage of the Spanish Liga fixture between Barcelona and Alaves. We'll bring you all the action as it happens at the Camp Nou. Kick off is at 20:00 GMT.

That was a chance! The angle was tight but Perez was through on goal. He decided to take on the shot himself, but gets it all wrong and slices high and wide at the near post!

And Laguardia has also been introduced off the bench for Alaves.

Rioja is also on for the away side as Alaves attempt to change the dynamic of the match.

Koeman makes a change for the start of the second half with Umtiti on for Busquets.

The second half is under way at the Camp Nou! Barcelona have a 2-0 lead over Alaves in this La Liga fixture.

HALF TIME: Barcelona 2-0 Alaves. The Catalans have been the better of the two teams and that is reflected in the scoreline. Trincao and Messi have both found the back of the net.

GOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOAL! Barcelona 2 (45+1 mins - Lionel Messi) Alaves 0. That was vintage Messi! What a goal that was! The 33-year-old cut inside on to his left foot, lined up the effort and then fired a low strike into the back of the net off the inside of the near post! Pacheco couldn't do anything about that! Wow!

There will be two minutes of stoppage time played at the end of the half.

This was the offside decision against Griezmann

Koeman will be pleased with how his team has played in this first half, although he might be slightly irked that they haven't been able to find the back of the net more than once.

PICTURE: Trincao opened the scoring

Can Barcelona find a second goal before the break to really make their mark on this game? Or can Alaves hit the Catalans on the counter attack to get back on level terms?

GOAL RULED OUT! The officials have looked at the tape and have decided that there was an offside in there, although the replays aren't exactly clear on where that offside was.

Hold on... there's a VAR check going on here. Was Griezmann offside when the pass was played over the top? They're taking a hard look at this one. It's very tight.

GOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOAL! Barcelona 2 (37 mins - Lionel Messi) Alaves 0. It's a second goal for Barcelona and Messi has found the back of the net! Griezmann was released in behind the Alaves defence through a long pass over the top. Pacheco made the save, but Messi was on hand to stick the rebound in the net!

Trincao denied by Pacheco! The Portuguese forward looked to be clean through on goal, Pacheco made the save to stop him, but the flag was up against Trincao anyway.

Mingueza gets a cross into the box from the right side, although the flag is up. It's not his natural position, but the youngster is doing well on the right side of the Barca defence.

Trincao has faced a lot of criticism since his move to Barcelona in the summer, but in his defence he had been predominantly asked to make an impression off the bench until tonight.