Julian Green 

http://de.wikipedia.org/wiki/Julian_Green

http://de.wikipedia.org/wiki/Fabian_Johnson
http://en.wikipedia.org/wiki/Fabian_Johnson

Everywhere, it is listed that they are American-German.
Even the next sentence identifies his dual citizenship.
The dude is GERMAN in that he barely speaks English.
Everything he does is in German.  He's German who happens to play for the USA.  HE IS GERMAN!!!  There is no way around it.  Just like Klinsmann.