Jozy Altidore likely will not participate in the Copa America Centenario after scans determined the striker will require up to eight weeks to recover from a right hamstring injury, Toronto FC announced.

The US star appeared to hurt himself in the run-up to a penalty kick in TFC's 4-3 loss to the Vancouver Whitecaps on Sunday (AEST). Whitecaps goalkeeper David Ousted saved the 35th-minute attempt, and Altidore remained in the goulmouth for several seconds before indicating that he needed to be substituted.

Altidore has a recent history of hamstring troubles. He had to be assisted from the field in United States's opening match of the 2014 World Cup against Ghana after suffering a tear in his left hamstring, and he missed several weeks of Toronto's 2015 campaign with a strain. The 26-year-old also missed out on the first two games of TFC's 2016 campaign with a similar injury.

US coach Jurgen Klinsmann is expected to release his final Copa America roster later this week.