Hector Walter Baldassi ( Río Ceballos , 5 January 1966 ) is a former Argentine referee in professional football . He whistled in 1998, his first match in the Primera División Argentina and led on July 25, 2000 his first international match, Venezuela and Chile. [1] He was a referee during matches at the Copa America 2004 , Copa Sudamericana 2006 and Copa Libertadores 2008 . Baldassi whistled his last international match on November 11 2011 , the World Cup qualifier Uruguay Chile (4-0) in Montevideo .