Bastian Schweinsteiger's first-half free-kick was headed in by Miroslav Klose to put Germany 2-0 up and Schweinsteiger repeated the trick for Michael Ballack to nod in to make the score 3-1 in the second half.
"We cannot allow two goals from set-pieces against a team like Germany. That made the difference," Postiga said.
But Scolari said his side were hard done by with Ballack's goal, claiming that the Chelsea man pushed Portugal defender Paulo Ferreira.
"I do not want to say Germany benefitted from that but all the TV screens show Ballack clearly pushed our player. Unfortunately the referee did not see it and we stopped," said Scolari.
"I do not know if it would have changed the match. We could have lost by 2-1 but when we are pressing the opponent and we concede a third goal we have to start all over again, our opponents grow in stature.
"I can't guarantee it would have changed anything but if it is a foul it has to be given by the referee."
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