Tévez was clearly offside when he headed in a chipped pass from Lionel Messi in the 26th minute at Soccer City. The referee awarded the goal after a lengthy consultation with his linesman as the pair was surrounded by angry Mexicans and Argentine players.
However, a mistake by Mexico defender Ricardo Osorio allowed Gonzalo Higuain the opportunity to make it 2-0 soon after.
Mexico coach Javier Aguirre refused to dwell on the opening goal by Tévez.
"I won't say too much about the refereeing. We lost our concentration after that offside goal. We were suddenly 2-0 behind, that was too much to catch up," said Aguirre.
"We have a lot of young players, many are only 21. They will do even better in four years," he added.