4-0 Italy
Anything other than a 4-0 for Portugal sees them go home, even then they need Sweden to also get 4-0'd by Australia to force the Oasis Bo3 tiebreaker.
Their fates are no longer exclusively in their own hands. I'm thinking we might see team Portugal giving Australia the biggest pep talk of their lives, possibly along with some bribes of the alcoholic beverage kind, just to boost their spirits even more.
I think they'll be going lights out to give themselves the best chance and just hope for the best afterwards.