Boca Juniors president Daniel Angelici has confirmed the club has agreed the sale of Leonardo Balerdi to Borussia Dortmund.
The 19-year-old has only made five league appearances for the beaten Copa Libertadores finalists, but is regarded as a top prospect.
Reports in Argentina have indicated Dortmund agreed to pay €15 million (£13m/$17m) for the defender, with a further €2m potentially due to Boca in add-ons.
And Angelici suggested the deal could go through in a matter of days, with Balerdi departing after fellow defender Lisandro Magallan joined Ajax earlier this month.
"Balerdi will travel to Germany this weekend and the medical check will be carried out on Monday," he told Radio Continental .