Rosicky was superb for victory over Sunderland on Saturday.
"He is a great accelerator of the game," Wenger said. "He always makes things happen, not with individual dribbling but with individual acceleration and his passing.
"I think when he arrived here he was less of a tactical player and more the 'Mozart' from Prague - he was purely a creative, offensive player.
"Today he is a real organiser on the pitch, I like to have him in the team because he gives a real structure to our team."
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