César Azpilicueta Tanco (born 28 August 1989) is a Spanish professional footballer who plays as a full back for English club Chelsea and the Spain national team. A youth product of Osasuna, he spent three seasons in La Liga before switching to Marseille, winning four major honours with the French club. In the summer of 2012 he moved to Chelsea, winning the Europa League in his first season and a domestic double two years later.