The Sharks could be forced into a major spine shake-up after fullback Connor Tracey suffered a knee injury.
Coach Craig Fitzgibbon has limited options with Will Kennedy and Kade Dykes already sidelined so may have no other choice but to move reigning Dally M medallist Nicho Hynes.
Meanwhile, Knights coach Adam O'Brien is expecting a double boost ahead of Sunday's elimination final with Kalyn Ponga and Jackson Hastings set to return.