Redknapp told Sky Sports News he will take over from assistants Joe Jordan and Kevin Bond in Monday night's match at White Hart Lane.
Redknapp said: "I feel fine, I've got more energy than I had before. I'll be on the bench for sure.
"Sometimes you don't realise there's something wrong. I feel better than I did three weeks ago."
He added: "I felt rough after the game. It actually knocked me for six.
"I'd rather be watching it from the bench than on TV."