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Martín Demichelis was born on 20 January 1980 in Bahía Blanca, Argentina. He is a professional footballer who plays as a centre back for Spanish club Espanyol and the Argentina national team. Demichelis started his career with River Plate in 1999 and made his debut in the Primera División in 2000. He helped the club win the Clausura championship in 2002 and the Copa Libertadores in 2003.