Palacios sustained the injury in River's 2-0 victory over Racing Club in the Superliga Argentina on Sunday. Despite being in discomfort, the 20-year-old completed the full 90 minutes for the reigning Copa Libertadores champions, reports Xinhua news agency.
In a brief statement issued on Tuesday, River revealed that scans showed the playmaker had a fractured right fibula.
Palacios, who made his debut for Argentina's national team last year, has been linked with a move to Real Madrid in July.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)