The 24-year-old Bosnia striker is one of the Bundesliga's most prolific scorers and City are reported to be in negotiations to sign him from VfL Wolfsburg once the transfer window opens on Saturday.
"We have the chance to win the league this year and the decisive factor could be Edin Dzeko," Italian Mancini said in the Daily Mail. "This player can decide titles and that is why we want him."
With Emmanuel Adebayor and Roque Santa Cruz both out of favour with Mancini and Mario Balotelli yet to settle despite his hat-trick in the 4-0 win over Aston Villa on Tuesday, Dzeko's goalscoring record looks enticing.
Wolfsburg's English manager Steve McClaren said recently that it could be hard for the club to keep hold of Dzeko.
"We hope that Edin stays because he is a world class striker, but we are in the business of football and nothing is 100 percent certain," he said. "We will have to see what happens."
