Mexico coach Juan Carlos Osorio was satisfied with his team's performance and particularly the way they kept Portugal's star man Ronaldo quiet - even if he did somewhat strangely still win man of the match for his only two pieces of positive intervention: hitting the crossbar and providing the assist for Ricardo Quaresma's opening goal.
Video replays were again consulted, but no change was made to the initial decision to award the goal. The 26-year-old told the official Confederations Cup website: "It goes without saying that he's a great player but we're a great side too, and I'm sure we can stop him".
Along with Portugal and Mexico, Group A includes Russian Federation and New Zealand which played their game on Saturday.
However, the goal was ruled out less than a minute later as the referee used the Video Assistant Referee to check Pepe's positioning when the ball had been fed back into the box from Ronaldo's free-kick.
Javier Hernandez levelled for Mexico shortly before half-time although Cedric Soares looked to have earned Portugal victory four minutes from time.
Portugal has beaten better teams than Mexico and El Tri's upcoming group games against New Zealand and Russian Federation are winnable.
Mexico controlled possession and spent more time in Portugal's area, but the Euro 2016 champions were a constant threat on the counterattack in front of 34,372 fans at the Kazan Arena.
The Real Madrid striker, whose club future has been the subject of media speculation after he was accused by Spanish prosecutors of committing tax fraud, which Ronaldo denies, set up Portugal's opener.
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Portugal boss Fernando Santos rued the concession of a late equaliser.
With that, the result now gives both of the teams one point, a fair result.
Title contenders Portugal and Mexico fought out an entertaining 2-2 draw in the Confederations Cup on Sunday, with each team scoring in the last five minutes. He scored the goal, which was largely down to Ronaldo, but his cool head made the chance exceptionally easy.
'We played a team that has very good, technical players.
The Portugal captain could not control the ball to shoot but his brilliant pass between three defenders left Quaresma free to round keeper Guillermo Ochoa and tap into the empty net.
Video assistant referees are in action at the Confederations Cup, and they instantly chalked off Gomes's goal.
Few players have succeeded alongside Ronaldo in Portugal's attack recently.