D.C. United defender Dejan Jakovic injured a hamstring in the first half of the Canada’s 2-2 draw with Ecuador on Wednesday night in Toronto, the team’s final tuneup for the Gold Cup.

Canada Coach Stephen Hart told reporters at BMO Field that Jakovic might not be able to play in the CONCACAF tournament. Canada’s opener is Tuesday against the United States at Ford Field in Detroit.

Jakovic, a regular starter for both United and Canada, was injured in the 39th minute.

United had planned to be without him for three weeks and, depending on Canada’s progression in the tournament, perhaps longer. Gold Cup teams have until 24 hours before their first match to make roster changes. If Jakovic were dropped, he would seem likely to return to Washington for rehabilitation.

Late Wednesday, United officials were awaiting additional details about the injury.