But so far the only action he has managed for his new side was in a pre-season friendly.
"Even in my first game with City against Valencia (in a friendly), I had problems with the knee from the [Germany] match in Copenhagen," he said.
When he is finally able to play, Boateng will join fellow former Hamburg players Vincent Kompany and Nigel de Jong in the City ranks.
His injury means he will miss Germany's Euro 2012 qualifiers against Belgium in Brussels on 3 September and Azerbaijan in Cologne on 7 September, and he will travel to see German team doctor Dr Muller-Wohlfahrt in Munich next week for treatment.
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