Green, 27, ruptured a bicep in the Magic Weekend over Leeds and was ruled out for up to 12 weeks.
Writing in his blog on the club’s official website, Green said: “During the game I picked up quite a bad injury. I remember going in for a tackle on Carl Ablett and coming out with a bit of a cork in my bicep, I played on but soon realised it wasn’t right after going up for a high ball and feeling it go completely.
“I hung around the in goal area for as long as I could then the doctor came over to me and said, ‘You’ve snapped your tendon mate.’ exactly what you don’t want to hear, ever!
“I had an operation on Wednesday (last week) and have been told to look at 12 weeks on the sidelines. I’ll be in a sling for two weeks before I get chance to start physio on it.
“If the guys are lucky enough to get to the semis of the Challenge Cup then that is my aim.”
In the other games, Bradford take on Warrington, Leeds host Leigh and Widnes play Championship side Keighley.