(Removes superfluous word in headline, no changes to text) By Fernando Kallas NEW YORK :Brazilian soccer's ultimate showman Renato Portaluppi has transformed Club World Cup underdogs Fluminense from relegation battlers to giant-killers in three months, setting up a blockbuster semi-final with Chelsea on Tuesday. The charismatic 62-year-old, known as Renato Gaucho, has helped them defy the odds to knock out Champions League runners-up Inter Milan in the last 16 and Al-Hilal in the quarter-finals