Mexico won 1-0 against an edgy Cameroon team in the pouring rain at the Estadio das Dunas in Natal, after Oribe Peralta slotted in a shot from close range.
Controversy struck early on as Mexico's Giovani dos Santos was denied two goals by poor refereeing decisions; the first a wrong offside call by the linesman and the second again a wrong offside decision from a corner after the ball was flicked on by a Cameroon head.
Peralta, however, put the Mexicans ahead on 61 minutes after Dos Santos' shot was parried out and the Club de Fútbol América striker capitalised.
Cameroon were denied a late equaliser when Benjamin Moukandjo's header was acrobatically saved by Guillermo Ochoa.
Cameroon were clearly very defensive, even appearing at one point to be playing with a 6-3-1 formation which meant that Samuel Eto'o looked very lonely upfront on his own and rarely got a shot in at the Mexico goal.
This result puts Mexico second in Group A behind Brazil, with the hosts to play next.
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