LONDON, Aug 11 (Reuters) - Brazil's women produced a

dazzling comeback to win Olympic volleyball gold on Saturday,

prompting a sneak preview of what life might be like in Rio de

Janeiro in four years time.

When Fernanda Rodrigues arched her back and delivered the

final blow to defeat a deflated United States, the roof of the

Earls Court area was almost blown off by an eruption of joy.

Forget Wembley, where the south Americans lost the soccer

final earlier in the day to Mexico, the rambling west London

arena, under threat from the wrecking ball, was the place to be

if you were wearing the famous yellow and green of Brazil.

"This is a wonderful feeling, it's amazing," said coach Jose

Guimaraes, whose side were atrocious in losing the first set

25-11 before storming back to repeat their final victory over

the United States in Beijing four years ago.

"Last year we lost every match against them. The U.S. were

favourites but after the first set we were really wonderful."

He could even afford a little dig at the soccer team's

failure to land gold.

"Soccer in Brazil is not a sport, it is a religion, so

volleyball is the first sport in Brazil," he said.

As hundreds of delirious Brazilians samba danced in the

stands, top scorer and glamour girl Jaqueline Carvalho milked

the applause and tearful libero Fabiana Oliveira kissed the

court the American team watched on sadly.

Inspirational U.S. captain Lindey Berg, together with four

more of her team, also fell at the final hurdle in Beijing and

she will not get another chance after announcing that it was the

end of her international career.

"I still believe we are a gold medal team," she told

reporters, wiping tears from her eyes. "I've no regrets, I've

given my heart and soul to three Olympics. It's been incredible

but I'm done now."

Coach Hugh McCutcheon, who led the U.S. men's team to gold

in 2008 is also moving on.

"This is the end of the road for me here in the

international arena," the New Zealander told reporters.

"It has been an unbelievable journey and I feel privileged

to have been able to do the things I have done and work with the

athletes that I have done."

It had all looked so good for the Americans when they raced

through the opening set in which Brazil were a shambles.

But when Brazil clicked into gear, there was no stopping

them. Roared on by most of the 15,000 crowd, they took the next

three sets 25-17 25-20 25-17 with Carvalho and Sheilla Castro

spiking to devastating effect and captain Fabiana Claudino an

oasis of calm in the hot-house atmosphere.

Brazil were already celebrating midway through the fourth

set before Rodriques got the party started for real.

The journey to gold was anything but straightforward for

Brazil. Defeats by South Korea and the U.S. in the group phase

brought criticism back home and after scraping into the last

eight they survived six match points before beating Russia.

"We started the Olympics really bad but once we started to

play our Brazilian volleyball I knew things would be different,"

captain Claudinho said. "We fought point after point.

"People were criticising us but we carried on, we trusted

ourselves, and the only objective was to win the medal and show

the people who didn't believe in us."

She spared a thought for the soccer players.

"I'm sad for them," she said. "I know that football comes

first in Brazil, but I'm happy we got the medal first."

Japan won the bronze medal after a 3-0 win over South Korea.

Brazil can make it a double celebration on Sunday when the men

face Russia in the final.

(Additional reporting by Toby Davis; Editing by Alison Williams

and Michael Holden)