Gerardo Daniel "Tata" Martino (born 20 November 1962) is an Argentine former footballer and manager of the Mexico national team.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.Martino was chosen to replace Tito Vilanova as manager of FC Barcelona at the start of the 2013–14 season, but announced his resignation on 17 May 2014, though his side finished runner-up in both the Copa del Rey and La Liga that season.
In 2015, he led Argentina to the Copa América Final, only to be defeated by hosts Chile on penalties.
His team also finished as runners-up in the Copa América Centenario, again losing to the defending champion Chile on penalties.
On 5 July 2016, Martino resigned from the Argentine national team.He was named the head coach of Atlanta United FC, a Major League Soccer expansion team that began play in 2017.
Martino lead the team to a MLS Cup victory in their second season and was named the MLS Coach of the Year before departing for the Mexico national team.