Striker insists his country will be gunning for six points from remaining two games
The two sides met over the weekend at the Loftus Versfeld Stadium, and a game that was heading towards a goalless draw went the Ghanaian way after an 85th minute penalty that was converted by Asamoah Gyan.
"The defeat by Ghana was a bitter pill to swallow," Zigic said on Birmingham's official website.
"We played well for 70 minutes and then got punished for not taking our chances.
"I missed a sitter myself while Ghana scored from out of the blue."
Now the White Eagles have the uphill task of trying to qualify knowing that they still have to play Germany, who blazed a trail on their way to a 4-0 victory over Australia.
Despite the obvious difficulty, the towering striker remains confident that his side can deal the necessary damage against their upcoming opponents.
"We won't be going for four points but for all six, although there are some permutations where a draw and a win would suffice for us.
"Germany were excellent against Australia but they had an one-man advantage for the entirety of the second half.
"It's all up to us right now and we have to believe we can qualify for the second round. We need to remain composed.
"We need to be careful and wait for our opportunity to come. We still believe in ourselves but the mistakes we made against Ghana cannot happen against Germany.
"We have to remain calm and keep a cool head because there are still six points for the taking in the remaining two matches and I am confident we can take them."