The Germans were leading through Kerem Demirbay's 48th-minute strike when a case of mistaken identity halfway through the second half that replays were meant to eradicate left the African champions bemused and irritated.
Vincent Aboubakar pulled one back for Cameroon as he nodded a header past Marc-Andre ter Stegen, who will have been disappointed with his attempt at a save.
"If he plays tomorrow, he has earned it", said Postecoglou. Bernd Leno was also at fault for Australia's two goals in Germany's 3-2 victory in its Group B opener.
"So that is why the coach took him too us, even though he was two years younger than us he was with us".More news: Role of DUP, new partner in UK government
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"That could have been a quarterfinal in the World Cup, such was the level of this game", said Pizzi.
"He is a great Australian, transcending sport, to play at three World Cups".
The Confederations Cup was a missed opportunity for Australia but the Socceroos should gain confidence from their improvement during the tournament in Russian Federation, coach Ange Postecoglou has said. Granted, three of those came against Germany, but they rode their luck at times against Cameroon and could easily have conceded more.
"We're playing really well in patches, " Kruse told Football Federation Australia TV.
"It's an unbelievable achievement to have played 100 games as he didn't play for Australia until he was 24, because he wasn't allowed to", said Postecoglou.
Postecoglou praised veteran forward Tim Cahill as Australia's captain made his 100th global appearance. A lack of fluidity in their passing game is easily made up for with a hunger to win back the ball in the midfield.
The Africa Cup of Nations victor have been struggling in front of goal this tournament and nothing other than a win against the World Cup winners will help matters. "He is a fantastic influence".