Watch: Nike releases 'Come out of Nowhere' ad for Giannis

Giannis Antetokounmpo is one of the most improbable stories in all of basketball.

Born in Greece to Nigerian immigrants, Antetokounmpo struggled to gain citizenship and sold trinkets on the street as a child to make ends meet before blossoming into an NBA superstar by the age of 22.

His story was told through the latest edition of Nike's "Come out of Nowhere" ad series.