Following Saturday's 5-3 friendly loss to Switzerland in Basel, Germany right-back Benedikt Howedes is convinced his team will improve.
The Schalke man believes Joachim Low's experimental side made many errors but will receive a massive boost when the numerous stars from Bayern Munich - who were rested for the match - return to action.
"It was very strange. We were punished mercilessly for the first two mistakes we made," Howedes told Goal.com. "Certainly I have not played my best game."
However, he concluded: "The Bayern players certainly will bring a lot of quality."
Centre-back Mats Hummels also expressed disappointment, but insisted that Germany's players have the quality to play better, provided they do not make such errors as in Saturday's loss.
"Of course, the defensive work can't be good enough if you concede five goals," he said. "If you look at all the goals you'll see that the problem is not one of individual quality.
"If you consider every single goal conceded you can clearly see where the mistake was made."
According to the Dortmund defender, the game was a poor one from both sides, with the hosts having simply taken advantage of the chances that fell their way.
"No magic football was played today, there were many, many mistakes on both sides," he commented. "The Swiss used two more than we did, and that's why we leave the pitch as losers."
Germany next face Israel in four days; their last friendly match before Euro 2012.