Chelsea go into the clash on the back of five consecutive domestic wins and, after a rocky start to his time as their interim manager, Benitez is starting to turn the tide.
But Redknapp said: "It's different at Chelsea. He walked into a squad of players there who are Champions League winners, so you've got a chance.
"You would have had to have been a real dope to have messed it up with that group. They have incredible players and Rafa is an intelligent guy."