Luiz Felipe Scolari must decide whether to risk Cristiano Ronaldo against Iran - but will welcome Deco back into Portugal's starting line-up.

Manchester United trickster Ronaldo is struggling to shake off a hamstring strain ahead of Saturday's Group D clash in Frankfurt.

And having secured a 1-0 win over Angola in their opening game, Scolari may opt not to gamble on the youngster's fitness.

Barcelona playmaker Deco will return after recovering from an ankle injury, so would fill the creative gap left by Ronaldo's possible absence.

Iran veteran Ali Daei has declared himself fit for the game despite complaining of a back injury following their 3-1 loss to Mexico.

And midfielder Ferydoon Zandi is expected to return after missing the opening game with a thigh injury.