York winger Steve Lewis faces a race against time after suffering a hamstring injury during Wednesday’s win at Rochdale.
Knights assistant coach Chris Thorman said: “Steve will be seeing the physio on Thursday and we’ll keep our fingers crossed because he’s looked good in training.
“However, if he can’t play then Danny Wilson can come back in and he’ll be eager to impress.”
Thorman added: “Our performance was OK against Rochdale but there are still things to work on.
“I would have thought a win against London will give us a decent shout (of qualification) but I’m not one for studying the table. I’m more concerned about the performances, getting some combinations going and fine-tuning a few things.”
Massara said: “Our focus is on continuing to work hard. We’re doing it tough and we realise that. It would be very easy for us to buy into some of the negativity that’s flying around but we’re working very hard, we’ve got a really positive camp and people know how good a side Halifax are.
“We’re only going to get better from having played the quality of opposition that we’ve played and we’re looking forward to York. It gives us an opportunity to have a look at a couple of guys that haven’t had much game time.”