The two west London clubs meet on Wednesday evening with the Blues beginning to find form under the former Liverpool chief after an initial spell of disappointing results.
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He told West London Sport: "You'd have to be a dope to have messed it up when you’ve got that group of players. He's a clever guy.
"He's walked in to a group of players there that are Champions League winners. You've got a chance, haven't you?"
Redknapp also admitted that he is facing a selection dilemma ahead of the clash at Stamford Bridge, after witnessing Benitez's men hammer Aston Villa 8-0 just over a week ago.
He added: "It's so difficult. If you open yourself up you can get ripped up like Aston Villa did.
"We've got to go there and get a bit of pride back. Whatever else, we've got to make sure we're in the game and are tough to beat."