Paul Gallen has declared he will be "100 per cent fit" for Cronulla's NRL preliminary final against North Queensland on Friday night.
Gallen missed the Sharks' qualifying final victory over Canberra with a back injury a fortnight ago, and has at times struggled to get out of his car or bed since pulling up lame from a regular training session before the match.
And while coach Shane Flanagan cleared him on Sunday to return for the must-win grand final qualifier, Gallen has confirmed he won't carry any injury concerns into the match.
"If nothing goes wrong between now and the game I will be 100 per cent fit," he told Sky Sports Radio's Big Sports Breakfast.
"I feel fresh, I feel good and I will be fine on Friday."
Gallen returned to training on Sunday, completing around half of the session.
He will train the majority of Tuesday's session, before a rest day on Wednesday and the usually light captain's run on Thursday.
However he said he no fears about a recurrence of the injury, which is believed to have originated from a surgery he had on his back a decade ago.
"It's happened twice in 10 years - it's a fair way apart," he said.
"It is a concern that you don't know when it's going to happen or why it happens.
"But I've got no concerns this week that come warm-up or come captain's run that it's going to go again. I'll be okay."