They came unstuck last weekend as they were beaten at Aston Villa but Dzeko says confidence is high under new boss Manuel Pellegrini.
He said: "Of course the people are expecting us to play like that and that's what we are trying to do with the new manager, to play aggressive, quick and attacking football.
"We showed that against a big club like Manchester United and why shouldn't we go forward with that and be more consistent with those games?
"It's just the beginning of the season and I am sure we will improve."
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