The Reds travel to the Etihad Stadium after securing a 2-2 draw against Arsenal in midweek and Mancini believes that it is a "dangerous game" for his side as they look to remain in the Premier League title race.
Mancini told reporters: "When you want to change like Liverpool have, it is difficult sometimes.
"Rodgers did some good results but Liverpool always is a strong team. It will be a dangerous game on Sunday."
Manchester City have yet to concede a goal in 2013.