Luis Suarez has set up all three of Barcelona's goals today.
Barcelona make it 3-1 with their first shot since the first half.
Lionel Messi picks up the ball about 30 yards from goal, beats a couple of defenders and then absolutely hammers in from outside the box.
Full-time in all the afternoon Bundesliga games. RB Leipzig will be top over Christmas unless Borussia Monchengladbach score about 15 goals later on.Copyright: .
A bit of a skirmish on the pitch and Barcelona's Samuel Umtiti and Alaves' Mubarak Wakaso are both booked.
Alaves have had three shots since the break. Barcelona have had none.
Now it's Ruben Duarte for Alaves, but his header goes wide.
Alaves are going for this now and another Catalonia international - Aleix Vidal - has a shot saved by Marc-Andre ter Stegen.
Joshua Zirkzee is the first player to score in his first two Bundesliga appearances while at Bayern Munich since Luca Toni in August 2007.
Dutch teenager Joshua Zirkzee has just made it two goals in two Bundesliga games - and Bayern Munich lead Wolfsburg with five minutes left.
Pere Pons is a Catalonia international, and played for Catalan side Girona when they were in La Liga.
Out of nowhere, Alaves are back in this! Pere Pons times his run perfectly to meet Ruben Duarte's cross and head past Marc-Andre ter Stegen.
Alaves make a change, as Luis Rioja replaces Javier Munoz. Please don't ask me anything about those two players.
Looks like RB Leipzig might be top at Christmas, Patrik Schick has just put them 2-1 ahead against Augsburg.
Antoine Griezmann stubs home a cross for Barcelona, but the flag went up. No goal.
Barca get a corner early in the second half but it's caught by Alaves keeper Fernando Pacheco, who played a couple of cup games for Real Madrid in the past.
And awaaaaaaay we go.
The players are in the tunnel ready to come out for the second half.
Can Barca finish 2019 unbeaten at the Nou Camp?
The answer to that, based on the first half, is a simple yes.
Potentially a big goal at the top of the Bundesliga as Konrad Leimer equalises for RB Leipzig against Augsburg. They have 22 minutes to get another and ensure they finish as the informal winter champions (Herbstmeisterschaft).
Luis Suarez has provided two assists so far. He also did that at Alaves in a 6-0 win in September 2016.
He only has more La Liga assists against Deportivo La Coruna (8) than against Alaves (5)