Sydney Roosters star Cooper Cronk has a torn rotator cuff and is in serious doubt of missing Sunday’s grand final against his former club Melbourne.

And Roosters premiership-winner Brad Fittler, now coach of New South Wales, believes it would be almost impossible for Cronk to get through 80 minutes in the toughest club game of the year.

Fittler compared Cronk’s plight with that of fellow Queenslander Johnathan Thurston who battled with shoulder issues throughout the back end of his career.

“I remember when Melbourne played the Cowboys and poor old Johnathan’s standing there and they just played these couple of plays where Nelson Asofa-Solomona just ran at Johnathan,” Fittler said on the Sunday Footy Show.

https://twitter.com/nrlphysio/status/1043509060211855361?s=19

“They’re too good at isolating you.

“Souths tried to (get to Cronk) and (John) Sutton got at him and he was brave launching his body to make the tackle. I don’t know if he could do that for 80 minutes.”

It should one of the best weeks of Cooper Cronk's life after the Roosters set up thrilling grand final showdown. But it doesn't get much crueller as Cronk is in severe doubt for the decider after scans revealed he's suffered a severe rotator cuff injury. @DanikaMason9 #9News pic.twitter.com/vzJFlEbiY3

— 9News Sydney (@9NewsSyd) September 23, 2018

Cronk’s ex-teammate Billy Slater is also in doubt as he awaits an appointment with the judiciary after a shoulder charge against Cronulla on Friday night.