The winners of Group A will take on the Group B runners-up in the semis, while the second-placed team from the group will face the Group B winners. A Mexico loss and Portugal loss by more goals or by scoring the same number or fewer goals than Mexico will see CONCACAF's champions advance.
Mexico dominated possession early on but Russian Federation went ahead fortuitously when Samedov beat goalkeeper Guillermo Ochoa just inside the far post after Mexico had failed to clear a header and midfielder Aleksandr Erokhin missed the ball as he was trying to shoot.
This will be the first senior meeting between eighth-ranked Portugal, and New Zealand, who are 95th - sandwiched between Guatemala and Madagascar. Joining them will either be Javier Aquino, who was Mexico's best player against New Zealand, or Hirving Lozano, who's yet to play in the tournament as he left the camp midweek to sign with Dutch club PSV.
Portugal have meanwhile been warned against underestimating New Zealand by the Kiwis' display against Mexico in which they could consider themselves unlucky to lose. "So we were forewarned", he said.
Mexico's Carlos Vela, center, is tackled by Russia's Yury Zhirkov, left, and Fedor Kudriashov, during the Confederations Cup, Group A soccer match between Mexico and Russia, at the Kazan Arena, Russia, Saturday, June 24, 2017.
"This team are on the right path, they have got great character, great belief and it's a young team moving in the right direction".
The Real Madrid superstar enjoyed a stunning sequence of games to end his 2016-17 campaign, netting 16 times in his final 10 fixtures. I repeat - some players play more, some play less but everyone feels an important part of this team.
Meanwhile, All Whites coach Anthony Hudson said his team was not just competing against Ronaldo in their clash today against Portugal.
Portugal coach Santos said at a press conference: "I will analyse the opponents and prepare the game regardless of who we will play". "We started the game really well, and were the stronger of the two teams".
"We'll try to counter their strengths and exploit their weaknesses, but we need to be focused". Portugal beat the hosts 1-0 in their last game, but an injury-time equaliser from Mexico's Hector Moreno ensured that the points were shared between the two sides in their opening game in Kazan.