Gerardo Daniel 'Tata' Martino (born 20 November 1962) is an Argentine manager and former football midfielder, who is currently the manager of FC Barcelona. Martino played mostly for Newell's Old Boys in his native Rosario. He holds the record of appearances with the team playing a total of 505 matches in all official competitions. He was also selected in a fan's poll as Newell's best player throughout the club's history.