Clubs: CA Independiente, Real Zaragoza, FC Barcelona
• Impressive displays in the Argentinian championship for Independiente earned him a first international cap in 2000; was set to join Real Madrid CF in 2003 but the transfer broke down and he moved to Zaragoza instead.
• Won the Copa del Rey in his first season at Zaragoza and maintained consistent form over four campaigns, the second two alongside his brother, making 139 Liga appearances and scoring five goals before Barcelona lured him to Catalonia on a four-year contract in July 2007.
• Was a first-choice centre-back in Frank Rijkaard's final season at Barça but a damaged anterior cruciate ligament in his right knee sustained during a UEFA Champions League semi-final against Manchester United FC caused him to miss the 2008/09 campaign.
• Made his return after 18 months out injured on 5 January 2010 in a Spanish Cup game against Sevilla FC; went on to make 11 league appearances during the second half of the season as Josep Guardiola's squad retained the Liga title.
• Suffered another injury-interrupted campaign in 2010/11, making just ten Liga outings and two in Europe as Barcelona won the title and reached the UEFA Champions League final.
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