Benitez believes Liverpool now have enough firepower to hold sway and said: "We have come really close before, but we are better equipped now to go on and beat them. We have players who can change a game like Gerrard, Torres and Ryan Babel, players who can score goals.
"We always had a plan going to Old Trafford. We tried to do certain things but in the end we did not have enough power. We have now. They have match-winners in Ronaldo, Wayne Rooney and Carlos Tevez, but we have two or three who can do the same."