Barcelona name 16-year-old Ansu Fati in starting line-up - and he scores early opener
He then sets up Frenkie de Jong for second goal
Gameiro pulls one back, but Pique and Suarez (twice) score for champions
Valencia named new manager this week, Albert Celades
That's the end of this live page now. Thanks for joining me tonight.
A goal and an assist for 16-year-old Ansu Fati, with his replacement Luis Suarez scoring twice - plus goals for Frenkie de Jong and Gerard Pique. Not a bad night for Barcelona.
Maxi Gomez's last two La Liga goals have been against Barcelona. His final strike for Celta Vigo was in their 2-0 win over the champions on 4 May.
Half of Barcelona's La Liga games this season have ended 5-2! They beat Real Betis by the same scoreline in the second game.
Barcelona 5-2 Valencia
That was the last kick.
Maxi Gomez
The subs link up to give Valencia a consolation - Denis Cheryshev crosses for Maxi Gomez to slide home from six yards out.
Well not quite yet...
Barcelona 5-1 Valencia
Valencia play the ball from left to right and the whistle will go soon.
Barcelona 5-1 Valencia
Two minutes added on.
Barcelona 5-1 Valencia
Free-kick to Barcelona, but it's too far out to shoot from. Especially with no Lionel Messi on the pitch.
Barcelona 5-1 Valencia
Not long to go now.
Rare Valencia attack but Lee Kang-in's shot is blocked by Jordi Alba. And Daniel Wass shoots over the bar.
Barcelona 5-1 Valencia
Barca hunt for a sixth but Arturo Vidal's cross is blocked and lands in the arms of Jasper Cillessen.
Definitely Frenkie de Jong's best performance since his summer move from Ajax.
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Barcelona 5-1 Valencia
This is the first time Luis Suarez has come off the bench to score twice in a league game - in the Netherlands, England or Spain.
Barcelona 5-1 Valencia
I wondered earlier if Luis Suarez might struggle to get a look-in. I have my answer.
Luis Suarez
Brilliant. Luis Suarez finds Ivan Rakitic, whose chip is cleared off the line. Valencia don't get it away and Antoine Griezmann finds Suarez, whose sweet first-time hit beats Jasper Cillessen at his near post.
Barcelona 4-1 Valencia
Clement Lenglet grimaces but it looks like he'll be OK to continue after being patched up.
Barcelona 4-1 Valencia
Barcelona have used all their subs, so if Clement Lenglet can't play on, they'll be down to 10.
Barcelona 4-1 Valencia
Valencia striker Maxi Gomez, who West Ham tried to sign in the summer, is booked for standing on the Achilles tendon of Clement Lenglet, who needs treatment.
Barcelona 4-1 Valencia
This is the first time since 2005-06 that Lionel Messi has not featured in the first four La Liga games of a season for Barcelona.
And that was just because he hadn't made his full breakthrough yet.
Barcelona 4-1 Valencia
Nelson Semedo plays the ball back to goalkeeper Marc-Andre ter Stegen. Semedo is nudged over and he's on the ground when Ter Stegen passes the ball back to him.
Free-kick to Barcelona.
