Islanders captain John Tavares suffered a knee injury in Wednesday's Olympic quarterfinal win by Canada in Sochi, and he is done for the remainder of the Games, Team Canada coach Mike Babcock said. Tavares tried to squeeze past Latvia's Arturs Kulda in the second period and it appeared that Tavares' left leg twisted awkwardly. He tried to stay on the bench but went off to the locker room before the second period ended. Tavares' Canada team barely squeaked by Latvia to get to Friday's semifinal game against the US, but the Islander captain won't be able to continue. His availability to his team here on Long Island is unclear as of now. The Islanders returned to practice Thursday, short their three Olympians as well as Frans Nielsen, who is out indefinitely with a broken hand, and Matt Martin, who has been nursing a lower-body injury. The Islanders don't play until Feb. 27 against the Leafs. Canada will play the United States in the Olympic semifinals at noon Friday. The game is scheduled to air live on NBC Sports Network.