Carlos Tevez and Gonzalo Higuain each scored a goal to put Argentina 2-0 ahead at halftime of their World Cup second round match against Mexico here on Sunday. Tevez headed into an empty net from close range in the 26th minute after Lionel Messi had latched onto a loose ball toward goal. TV Replays showed the striker to be offside, triggering protests from the Mexicans. Higuain then capitalized on a blunder by Mexico defender Ricardo Osorio who passed the ball straight to Higuain just outside the penalty box. The Argentinean striker calmly rounded goalkeeper Oscar Perez before slotting into an empty net in the 33rd. 