Ozil has come under pressure for his performances for both Arsenal and Germany during the past few weeks, but Ballack believes that the playmaker is due an impressive display at the World Cup.
"I am surprised by the critical views on Mesut Ozil," he told Express. "For me, he is and he remains an extraordinary player.
"Yes, he has not had a overwhelmingly good match at the World Cup until now but he did not disappoint me either. He needs a magic moment, he must force this moment to happen."
Germany play their final group fixture at the World Cup on Thursday when they meet the USA in Recife.