Sebastián Bruno Fernández Miglierina (born 23 May 1985) is a Uruguayan footballer who plays for Club Nacional de Football as a forward.
Born in Montevideo, Fernández started his professional playing career in 2004 with Miramar Misiones. In 2007, he joined Defensor Sporting Club where he was part of the team that won the Apertura 2007 championship and the Copa Uruguaya 2008.
In 2008, he joined Argentine Club Atlético Banfield, where in 2009 he was a key member of the squad that won the Apertura 2009 championship appearing in 16 of their 19 games. On 13 December 2009 he celebrated with his team mates when Banfield won the Argentine championship for the first time in the history of the club.
On 17 February 2010, Fernandez helped his team mates thrash Deportivo Cuenca in Copa Libertadores, scoring two goals either side of half-time to enrich his team's 4–1 victory in Ecuador.
In July 2010 he had a medical with La Liga side Málaga CF. On 5 August 2010 he signed a contract with Málaga for four years and his transfer cost the Spanish side €3.6 million. He already started to pay off some of his fee as he scored a goal on his debut in a home match against Valencia CF on 28 August 2010. He finished the season with 7 league goals, being the club's second best goalscorer.
In 2011–12, after the summer signing of Ruud van Nistelrooy, Seba was demoted to third choice striker, often coming on as a substitute. On 21 November he started as a right winger against Racing and scored his first goal of the season, in a 3–1 away win. 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 got an injury early in the season ruling him out of the majority of the campaign. His 86th-minute header in Rayo's 3–0 win against Granada on 26 April 2014 was his first goal in more than two years.
On 1 August 2014 Fernández returned to his home country, joining Nacional.
Fernández made his international debut for the Uruguay national team as a late substitute in a friendly game against Romania on 24 May 2006. On May 2010 he has been called up for 2010 World Cup.
On 27 July 2010 he was reserved to play a friendly match against Angola in Lisboa.
Fernández scored his first goal for Uruguay in a friendly match against China PR.