Javier "Javi" Martínez Aginaga (born 2 September 1988) is a Spanish footballer who plays for FC Bayern Munich in the Bundesliga, as a defensive midfielder or a central defender. He arrived at Athletic Bilbao in 2006 before his 18th birthday, quickly imposing himself as a starter and going on to appear in 251 official games over the course of six La Liga seasons, scoring 26 goals. A Spanish international since 2010, Martínez was a member of the squads that won the 2010 World Cup and Euro 2012, and also played at the 2014 World Cup.