Cristiano Ronaldo left training on Monday with a pack of ice wrapped around his right ankle - but is hopeful of facing Turkey in Euro 2008.
He did not appear to be limping, or be in any pain, and the situation remains unclear as the Portugal camp refused to confirm the nature of the problem.
With their opening Euro 2008 game just five days away, Luiz Felipe Scolari will be desperate for his wing wizard to shake off the knock in time to face to Turkey.
They narrowly missed out on home soil four years ago, finishing as runners-up to Greece, and will be keen to go one better this time around.