|Date of birth:||
August 22, 1997
He began his football career in his native Argentina where he made his senior debut in 2015 with Racing Club. There he spent four seasons and represented the club in the league and Copa Libertadores, scoring 27 goals in 60 appearances before joining Inter in 2018.
Martínez also previously represented Argentina at various youth levels and competed at the 2017 South American U-20 Championship and 2017 FIFA U-20 World Cup. He made his senior international debut in 2018.