At the Olympics he was not initially part of the squad but was called up for the gold medal game to cover for the injured Nicolás Burdisso.

[1][2] He also got 4th place in 2003 FIFA World Youth Championship, and was part of the Argentina squad that were runners up in the 2004 Copa América.

Fernández started his professional career at the age of 15 when he joined Newell's Old Boys.

Fernández joined Dynamo Moscow, Russian Premier League football club in 2006 and soon became one of this club fans' favorite and was voted "best Player of the Year" by Dynamo Moscow supporters.

Newell's Old Boys This biographical article related to association football in Argentina, about a defender born in the 1980s, is a stub.