In 2008, he joined Argentine Club Atlético Banfield, where he was a key member of the squad that won the Apertura 2009 championship, appearing in 16 of their 19 games.

On 17 February 2010, Fernandez helped his teammates thrash Deportivo Cuenca in Copa Libertadores, scoring two goals either side of half-time to enrich his team's 4–1 victory in Ecuador.

Exactly one year later he scored his first Champions League group stage goal in a 2–2 away draw against FC Zenit Saint Petersburg.

Fernandez signed for Rayo Vallecano in the summer of 2013 but suffered an injury early in the season, ruling him out of the majority of the campaign.

[6] Fernández made his international debut for the Uruguay national team as a late substitute in a friendly game against Romania on 24 May 2006.