Anderson says Manchester City lack the firepower to worry Manchester United tomorrow.
Brazil midfielder Anderson said: "This derby comes at a very positive time for us - City could be without Emmanuel Adebayor, Robinho, Roque Santa Cruz and Carlos Tevez.
"However hard they work, City's attack will be inferior and this is a serious problem for them.
"I prefer to play against teams with all their stars but if our rivals are affected by injuries it's hardly our problem."
