UPDATE1-PREVIEW-Soccer-Fearless U.S. braced for Brazil showdown

*U.S. hope to spring another upset in final

*Favourites Brazil seek third Confederations Cup win

(Adds official announcement of referee in last line)

By Mike Collett

JOHANNESBURG, June 27 (Reuters) - The United States are one victory away from claiming a major FIFA competition for the first time if they can produce another shock against Brazil when the Confederations Cup reaches its climax on Sunday.

Skipper Carlos Bocanegra, whose side were beaten 3-0 by Brazil in their Group B encounter on June 18, says the U.S. will play without fear against their heavily favoured opponents and adopt an entirely different strategy for the match.

Unlike the U.S., Brazil know all about winning major trophies, having been crowned world champions five times. They are seeking a third Confederations Cup victory in attempting to retain the trophy they won in 2005.

"The first time we played Brazil we came out a bit timid," Bocanegra said at a news briefing on Friday. "We gave them too much respect.

"We went out and sat back too much but we changed it against Egypt, playing with a lot of energy from the start and we carried that into the Spain game. We had a go at them for 90 minutes rather than absorb pressure."