So, a humiliating night for Gary Neville. The bad news is his side have to face Barcelona again in the return leg next Wednesday. Hopefully they will give the European champions a better game. Thanks for your company. Until next time...
- Barcelona chasing five trophies
- Holders Barca have won it 27 times
- Valencia last won Copa in 2008
Before tonight Valencia were unbeaten in five matches in the Copa del Rey under Gary Neville, scoring 11 goals and conceding just once.
You can rip that one up.
Humiliation? Perhaps overused, but maybe not tonight?
Into the closing moments. Valencia need putting out of their misery.
This is a slaughter. Barca make it seven - and Luis Suarez gets his fourth - after Arda feeds the Uruguay forward, who first-time on the turn in off the near post.
A header from Luis Suarez at the back post...and it's a hat-trick for Luis Suarez. That's 34 goals in 33 games for Suarez this season.
They're chanting Luis Enrique's name around the Nou Camp. Barca have been a joy to watch even though they have been playing against 10 men for half the tie.
Exhibition stuff from Barca. We're into the last 10 minutes. Time for another goal or two from the hosts?
There's a second leg to come at the Mestalla next week. What's the point? Barca are surely through to their sixth final in eight attempts.
Terrible defending by Valencia as they fail to clear the ball inside their own area, Messi wins it back and fires past the keeper who should have saved. It's another hat-trick for Lionel Messi. He could end this match with four or five goals at this rate.
Cheryshev has the ball in the back of the Barca net...but it's disallowed for offside. Valencia's night cannot get any worse.
Moments before Messi's second goal, Valencia sent on new loan signing Denis Cheryshev from Real Madrid. You can guess the 'welcome' the Russian winger received from the home fans after his inclusion led to Real being eliminated from the competition in December.
So, who will be first to get their hat-trick? Messi or Suarez?
And the fourth duly arrives through the boot of Messi after another outstanding move. Suarez is again heavily involved, his backheel allowing Messi to pick his spot inside the area. This is starting to get very ugly for Valencia and Gary Neville.
Chances for Barca...lots of chances. Arda Turan,Messi, and then Messi again, all go close with efforts. You get the feeling that fourth goal is not far away.
Not sure what Gary Neville has said to his players at the interval but they've made a lively start to the new half. Barca defender Jeremy Mathieu concedes a corner but normal service is quickly restored as Gerard Pique goes close with a header that lands on the roof of the net.
Changes made by both teams at the start of the second half. Valencia bring on Ruben Vezo for Siqueira, while Iniesta is replaced by Sergi Roberto.
Prince Gyimah: Gary Neville won't last at Valencia.
Eggy: Just a shame he can't actually move the players magically by touching the screen to where they should be.
Sai Mann: Barca playing so well, great to watch. Sad for Gary Neville though.
The 10 men of Valencia get us back under way. Can Valencia keep the score down? Will Barca rub salt into Gary Neville's wounds?
Just the 72% possession from Barcelona. There is a second leg to come next week but unless Valencia start defending, they might as well scrap the return at the Mestalla.
Tom Fisk: Neville should have waited for the Celtic job. Pretty much guaranteed success, suits his character and probably available soon!
Thomas Neilly: Neville never managed a team - gets Valencia. Yet many mangers who have proved themselves would never get near the job.
Aron Nyagweya: Valencia looking ordinary and clueless. They should seriously consider hiring engineer Pellegrin next season.
Not only are Valencia being out-played and losing heavily, they will have to play the second half with 10 men. This is turning into a disastrous night for Gary Neville.
Drama right at the end of the half. Valencia defender Shkodran Mustafi is shown a red card for taking out Lionel Messi who was the last man. Neymar steps up...and hits the post.
So close to number four. And it's that Suarez-Messi combination again that unlocks the Valencia defence. Suarez is in the clear, he looks up and finds the run of the Argentine who hits the woodwork.
A rare chance for Valencia. Daniel Parejo connects with the ball in the box but there's no composure and it flies over the bar and into the crowd. The visitors cannot wait for the half-time whistle.
Four shots, three goals. Barca have been utterly ruthless but that does not excuse Valencia's defensive frailties. It's been men against boys and the scary thing is there's another 50 minutes or so to go. The visitors have actually improved since conceding the third goal but Barca look as though they will score each time they venture past the half way line.
Gary Neville has responded to the third goal by making a change. Midfielder Danilo is replaced by France-born winger Sofiane Feghouli. His team is taking a real battering and half-time is still another 10 minutes or so away.
Another sumptious Barca move...another goal. Lionel Messi finishes from eight yards after Valencia's defence is carved wide open by a some wonderful one-touch passing. Neymar, who looked hurt in the opening stages after sliding off the pitch, has made a full recovery and played a big part in the goal.