Despite having no match practice, Fox is expected to take over from Marcus Hall in his regular left back slot.
Speaking to the club website, Fox said: "It been a long period to have off and it's been hard but we've been training to a very high standard recently considering we've had four days off because of the international break.
"Reading will be a really hard game for us but having beaten both Birmingham and Wolves at home I think it will stand us in good stead.
I feel fine now and there's no problem with the injury I had. I'm just training and trying to get my fitness and sharpness back so I can help the lads finish off the season
"We've got eight games left and two games in hand over most times so I think we're capable of making a good last push."