The manager was upset after El Tri saw a pair of Giovani dos Santos goals wrongly disallowed.
NATAL, Brazil — Mexico coach Miguel Herrera has criticized referee Wilmar Roldan for taking what he perceived to be two legitimate goals from his team in El Tri's 1-0 win over Cameroon.
Giovani dos Santos twice appeared to give his side the lead in the first half but was denied by the assistant referee's flag, although replays suggested he was onside.
Mexico went on to win 1-0 through Oribe Peralta's goal on the hour mark and while Herrera was happy with his side's performance, he insists the officials made the wrong calls.
PHOTOS: Opening ceremony | Brazil protests | Soccer fanatics | Fan tattoos
"The team has won three points and that's what we wanted," he told reporters. "If we keep this tempo going then I'm sure we will go through to the next round.
"The referee took away two goals that were clear. We would have been able to leave with a bigger lead, but the team did not get desperate. I'll have a quiet sleep tonight, as always. Today there was one team on the pitch who played with the ball. But we are now thinking about the next game."