Portuguese coach Luiz Felipe Scolari, who led Brazil to the 2002 title, is keeping his starting line-up under wraps but that does not worry the Mexicans, who have to go for the win after only following up a win over Iran with a draw against Angola.

"It shouldn't matter to Mexico whether Figo, Cristiano Ronaldo, Deco or Pauleta play. We know they are important players who make a difference for Portugal, but what matters for us is that Mexico go out there and win to take first place in the group," said Mexico's Argentine-born Villarreal striker Guillermo Franco.

Mexico, nicknamed the 'Tri' after their tricolor flag, have put themselves under pressure with the Angola stalemate.

"A win is vital as that's the only result which really serves our purpose. Although a draw might well see us reach the next round we are only thinking of winning," said midfielder Pavel Pardo.

Mexico believe Portugal may hand a chance to a few of their fringe players but Pardo said that that would not make the task any easier for the 'Aztecs.'

"It could be more dangerous as the reserves will want to grab their chance of holding down a first team place - against us they might have that chance."

For defender Carlos Salcido "the Portuguese will certainly keep back a few players for the next phase," where they could meet Argentina or The Netherlands.

For Franco, whatever the outcome of the Portugal match, future rivals "know that in any event they have a tough opponent in Mexico."

Four years ago Mexico, quarter-finalists on home territory in 1970 and 1986, won their group at Italy's expense and looked set to do more damage but they then slid out to the United States.