The fact Redknapp barely spoke to Bentley didn't help his confidence.
He told the People: "I'm an emotional person, I like to talk to people and interact, and I prefer people to just tell me straight.
"When we got into the Champions League I played 20 games and then, for the last two games, I was just binned and not told. That lives with you.
"I never knew where I stood. It felt like it didn't matter what I did, I wasn't going to play and that's a funny place to be as a professional footballer."