Voller said there was no embarrassment in losing to Wales and said it was a good test for his side ahead of Japan and South Korea. It also gave him the chance to give his injured players a run out.
However, key players Sebastian Deisler, Christian Worns, Ziege and Marko Rehmer are still not fully fit, but Vogts is hopeful they will play their way back into form.
"I have every hope that players who have been injured will get fit in time for the World Cup. That is why we have these games and it is important that the players pick up their match fitness.
"These games have been arranged to allow those injured players to get themselves into form.
"Deisler was better than he was in last week's 7-0 win over Kuwait. Ziege was good enough, while not being as good as he was before being injured.
"There is no shame or embarrassment about losing to Wales. This match was just a test and the only thing that counts is the World Cup."
Germany continue their preparations with a friendly against Austria on Saturday.
Germany, like England, are not without their injury problems as they head to the World Cup, but Christian Ziege was described by Rudi Voller as 'good enough' against Wales.