"We are monitoring his progress day by day," said coach Neil Kelly.
"There is a possible tear of the wrist ligament, and it is difficult to ascertain how bad it is.
"Does it need an injection, strapping up, will it be okay or will he not be able to play? They are all questions that we are trying to answer and obviously the decision ultimately will be between the medical staff and Dennis himself.


"But we will give him every opportunity to make the right decision and I won't be naming the side until the weekend.
"The good news is that Lee Marsh is now fit again and will come into the squad, whilst the form shown by Mike Wainwright at stand-off against Batley, does give us another option. But Dennis is a key strike player and we will give him every opportunity to play."
Likewise Toa Kohe-Love, who heads for Widnes at the end of the season, is also battling to be fit for Sunday, but Kelly confirms his availability is less crucial.

He said: "I was not too unhappy with the way that Adam Rudd and Adam Thomas performed in the centres against Batley, and of course Adam Higson can play there too, so I do have cover if Toa is not fit.
"Fundamentally the side will not be much different from the one that beat Batley, but we want to make sure we keep our options open."


Whitehaven were beaten at Leigh in the last ever league game at Hilton Park, three weeks ago, but after a battle of words , tensions are running high for Sunday's winner takes all clash.
"It is a one-off game and the winners go through, while the losers go out," said Kelly.
"So that does have its own pressures. We know that Whitehaven will be a tougher proposition this time out, because of that fact. We know all about them and the problems they pose and they have a couple of players back which will no doubt pose a few more problems.
"They certainly did a lot of bleating about the manner they lost last time out and that is sure to fire them up.


"Coach Ged Stokes accused us of rough-house tactics , but I thought we showed great discipline, under some real provocation, not to get involved.
"They were the side that had two players sent off and the discipline panel seemed to back us up, not them. But they have top players, and if they play rugby they will be a real threat."
Leigh will start slight favourites for what may be the last ever game at Hilton Park.


But Kelly doesn't see it that way: "If we win and Widnes win at Halifax, then we get home advantage for the next round too. And I can see that happening."
The way the play-off games have been scheduled has left Kelly feeling that there has to be a more fair way of allocating the matches.


"Because of TV schedules you can play on a Sunday and then have to play the following Thursday, which only gives a three day turn-round.
"A team that plays on a Thursday would get the full seven days. It is something that needs to be looked at for the future so that there is no advantage in situations like that."