In a huge blow to Cronulla's NRL finals hopes, Sharks playmaker Todd Carney has all but been ruled out of Friday night's clash with Manly due to a hamstring complaint.

A Sharks official said Carney would be monitored during the week despite not being named in their side on Tuesday.

However the official admitted Carney faced a race against time to be fit for their must win clash.

"Sharks medical staff will continue to work on the injury (but) he is not expected to be fit in time for the match on Friday night," the official said.

Carney suffered the hamstring complaint late in their controversial 20-18 elimination final weekend win over North Queensland.

Utility Luke Lewis has been named as Cronulla five-eighth.