Ajax have announced the signing of Lisandro Martinez from Argentine club Defensa y Justicia.
The 21-year-old central defender, who can also play at left-back, signed a four-year contract with an option to extend for a fifth season after completing a medical on Monday.
He played a key role for Defensa in 2018 as they finished second in the Primera Division, four points behind Racing, and earned his Argentina debut in March when he featured against Venezuela.
Editors' Picks
And Ajax director Marc Overmars says a lot is expected of him in Amsterdam as he teams up with compatriots Nicolas Tagliafico and Lisandro Magallan.