Despite all they say: If none of them scores a goal in the first 30 minutes (maybe even less) they'll both settle for just maintaining the 0:0.

None of them is stupid enough to risk a safe place in the KO round for some misguided sense of sportsmanship.

The other two teams had it in their hands when facing Germany and USA directly. They failed. Asking for them to risk anything just for ghana and portugal to still have a chance is naive and stupid. Any team in the same situation would do the same.