Portugal's Fernando Santos made eight changes from the loss to Chile in the semifinals, with Cristiano Ronaldo absent after leaving the squad to spend time with his newborn twins.
Mexico's Juan Carlos Osorio made five changes
Portugal fought back from a goal down to beat Mexico 2-1 in extra time in the Confederations Cup third-place game on Sunday.
Facing defeat at the end of the 90 minutes, Portugal sent the game into extra time with Pepe's volley. Adrien Silva won it with a 104th-minute penalty following Miguel Layun's handball.
Rafael Marquez of Mexico fouls Portugal's Adrien Silva for a penalty that the midfielder netted
Portugal defender Luis Neto turned Javier 'Chicharito' Hernandez's cross into his own net in the 54th minute to give Mexico a 1-0 lead.
Both teams finished with 10 men. Portugal's Nelson Semedo picked up his second yellow card in the 106th minute, and Mexico's Raul Jimenez was red-carded six minutes later for a reckless tackle.
Mexico coach Osorio was also sent off for his angry reaction to the referee's decision not to give a penalty.