Wigan prop Ben Cross will miss out on the chance of a grand finale after discovering that his broken arm has not healed as quickly as he had hoped.
The Widnes-bound Aussie, 32, who joined Wigan on a short-term deal in July after his release by Leeds, broke his forearm in only his fourth game.
He made a surprise return against St Helens in Wigan's play-off opener.
But he complained of soreness after the Saints game and x-rays have now indicated another stress fracture.
"It is disappointing for Ben," said Wigan coach Michael Maguire. "He won't figure again for us."
Cross, who was hoping to bow out with a possible Grand Final appearance, is leaving Wigan at the end of the season, having signed a 12-month deal with Super League new boys Widnes.
Maguire hopes that centre Joel Tomkins will be available for Saturday's qualifying semi-final after coming off last Sunday with a leg injury in the 44-0 win over Catalan Dragons.
Wigan also hope that prop Lee Mossop will be fit to return after aggravating a hamstring injury in the warm-up on Sunday.