Redknapp told reporters: "I'm out on that training ground every single day. Anyone who says I'm not out there every day, that is a lie. But I don't hold grudges. I've always been a manager where people go 'you do love a problem player'. Yes, I have.
"The big difference is the ones I've had before keep producing on the pitch. Adel needs to produce. He could be an incredible, incredible footballer for this football club.
"No-one would be more pleased if he gets himself fit, gets back in the team, has a fantastic run, sticks two fingers up to me, I'd be delighted. I love people with ability, I love people with talent. I just want him to get back to showing us what he can do."
QPR face Aston Villa in the Premier League on Monday evening.