I don't know, I'm italian and I wasn't really scared by Spain. On this match, I don't have a good feeling. Anyway Italy never lost to Germany since a long, long time. They are unlucky vs Italy, or something.
This time De Rossi is injured (not totally, I heard that he'll try to play but still), which is our main playmaker. Thiago Motta, which is another (almost) good playmaker can't play this match (I don't know the technical words in english, anyway he took 2 yellow cards over those matches and can't play today), so we'll don't have a good playmaker.
As Italian, I can't bet on Germany tho.
The only thing I can be sure is that you'll heard the whole Italian team screaming the anthem, and the whole Italy will scream it with them!
Good Luck, Germany.