Physio Jon Fearn told readingfc.co.uk, "Glen came off concerned about his hamstring, having felt a twinge. He's got very minor grade one damage.
"He did the right thing coming off and we hope he'll be available on Saturday.
"Siddy got a knee right in the centre of his hip, and it gave him nerve pain and a very sore backside!
"He's getting better now and we'll see how he is in the coming days. We're confident for the weekend."
Dave Kitson is on the way back again. He's doing light running as he bids to overcome a hamstring injury that occured as he was recovering from a knee injury.
Bobby Convey is back from a period of rehabilitation in the States. He's unlikely to feature this weekend against Bolton.