The midfielder is a player Redknapp admires but the R's boss admits to being totally frustrated with the Moroccan.
He said: "Only he can get himself fit and ready to play. You can take a horse to water - but how far away is the water?
"I want Adel to get fit and start playing football. We need him fit and playing. I've told him that if he is fit, he's back in he squad.
"He has had injuries pretty much since the start of the year - but don't ask me how you get injuries when you don't train and you don't play."