Barcelona have completed the signing of Argentinos Juniors defender Roman Vega.

The 18 year-old left-back has signed for Barca on a season-long loan with an option to buy.

The talented defender will initially be registered with Rafa Marquez's Barca Atletic squad.

Barca are currently working through paperwork to secure his visa, which is expected to be completed next week.

Vega is also a member of former Barca defender Javier Mascherano's Argentina U20 team.