And Blues icon Jimmy Floyd Hasselbaink fears a Rooney backlash against his old club.
"Rooney will start. It obviously got everybody’s attention that he didn’t start against Real Madrid," Pally told the Daily Star.
"He will be gutted he didn’t start that game. He may even be embarrassed by it. But I think you will get a big reaction from him."
Hasselbaink added: "That’s why I think this will be a hard match for Chelsea. You will get a reaction from him now. He will want to show he is still a big player. That could be dangerous for Chelsea. It’s never easy going to Old Trafford. They will have to be so sharp. Their concentration levels will have to be spot-on. If not, they’re in trouble."