O'Neil said: "No-one to welcome back - we are as we were with the injured players. I was critical of us as a group on the day for what we were able to produce. There has not been many times that I have had to do that this season, but that was one that fell below the standards that we look to get to.
"It's probably good for us that we have not got long in between games so we can look to bounce back very quickly against Luton.
"The lads are still in very good spirits. It's the Premier League so you are going to suffer some tough moments but they have bounced back very well from other ones so far this year and we will be looking to do the same tomorrow. It's a big game for us, Luton are one of the ones involved in a scrap near the bottom but we are keen to make sure we are at our best again."