He was impressive in the 2013 Under - 20 World Cup , but since then , he 's seemingly regressed .
AC Milan 's Jherson Vergara is supposed to eventually fill in at a defensive position .
Jherson Vergara was impressive in the 2013 Under - 20 World Cup , but since then , Jherson Vergara 's seemingly regressed .
AC Milan 's Jherson Vergara is supposed to eventually fill in at a defensive position .