Juan Martin Del Potro defeated Roger Federer in the first of their two Copa Claro Nokia exhibition matches Wednesday night in Argentina, 3-6 6-3 6-4. The two will face off once more, at 8:30pm on December 13. After that, the Swiss maestro heads to Colombia to play Jo-Wilfried Tsonga on December 15. See more information and full schedule here.
Full match video (via official Roger Federer YouTube channel). Video is currently set to private.