Mexico striker Javier Hernandez cancelled out Quaresma's opener shortly before halftime and the two goals in an exciting last six minutes ensured the teams shared the points.
With a few minutes remaining, Cedric blasted a shot from a tight angle that squeezed past the 'keeper, but Moreno's late header rescued a point with only a minute remaining. Hector Moreno - who lost Quaresma on the first goal of the match - made amends for his error by beating José Fonte and powering a header into the back of the net to secure a draw for El Tri.
Host Russia who defeated New Zealand 2-0 in the opening fixture of the tournament lead the group with 3 points.
And such was the impact of the change that his compatriot Fonte admitted Ronaldo's new hairdo took a few of his Portugal teammates aback when he joined up with Fernando Santos' squad in Russian Federation ahead of the Confederations Cup. Or go into the referee's ear and say "Hold on, there was a problem three phases back, that we need to have a look at", that to me was very odd.
For Mexico's coach Juan Carlos Osorio, he too does not have a lot of injuries to deal with but his captain and Mexico's most experienced player Rafael Marquez could miss the first match because of a back spasm.
For Portugal, the match will be a chance for Cristiano Ronaldo and company to add another accomplishment to last year's stunning UEFA Euro 2016 title.
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Borussia Dortmund midfielder Raphael Guerreiro failed to deal with a cross into the box and Carlos Vela teed up Hernandez, who met the cross with a diving header.
Arturo Vidal and Eduardo Vargas fired Chile to a 2-0 win over Cameroon, but the game was once again dominated by the video assistant system which is being trialed at the Confederations Cup. A report by a Portuguese newspaper two days before Sunday's game said that the Madrid forward had made the "irreversible" decision to leave the Spanish club because he was upset with the allegations. "It was a fair result for how the teams played".
More confusion was caused when Argentine referee Nestor Pitana called a review for unclear reasons after defender Cedric Soares's deflected shot in the 86th gave Portugal a 2-1 lead.
Dropping his shoulder to send goalkeeper Guillermo Ochoa to ground, Quaresma rounded the stopper and slotted the ball into an empty Mexico goal.
Portugal boss Fernando Santos on the result: "We played a team that has very good, technical players".
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