Carlton superstar Chris Judd is adamant a lack of luck rather than fitness was responsible for his hamstring injury.

Judd made a delayed start to the AFL season due to achilles surgery, and lasted six minutes in his return on Sunday before limping off Etihad Stadium.

The dual Brownlow medallist will undergo scans on Monday, with sports medico Peter Larkins telling Fox Footy he would spend at least four weeks on the sidelines.

Judd, who played as the substitute in the 28-point win over the Western Bulldogs, was upbeat the injury sustained in the Blues’ first win of the year was not dire.

“It’s not too bad,” Judd said a day after he tweaked the muscle while being pushed by Bulldogs forward Stewart Crameri.

“I’ve obviously done a couple before and they’re never pleasant, but it doesn’t feel like it’s the worst one I’ve done.”

Judd’s focus on fitness rather than football at training has left the 30-year-old bereft of match practice, but he dismissed the notion he wasn’t ready to return.

“I’d done a heap of running and a heap of leg strength work, so there was no issue with conditioning,” he said

“Sometimes in footy you get put in positions the human body can’t tolerate – that’s just bad luck.

“It wouldn’t have mattered if I’d trained for 50 weeks or six weeks.

“You look at the GPS data, and that speed that I was pushed at was twice as quick as anyone else moved for the night.

“So it was just pretty simple mathematics. Your hammies can’t tolerate that and there was a bit of a pop.”

Judd was doing his best to stay positive, despite a further setback that is likely to result in him missing the first half of the 2014 season.

“It’s not the end of the world. I’ll be back and it was great the team had such a great win,” he said.

General manager of football Andrew McKay reiterated coach Mick Malthouse’s post-match declaration that Judd was fit and defended the club’s decision to use him as the substitute.

“Given that he hadn’t had any game time this year, we thought the sub would be perfect for him,” McKay told radio station SEN.

“It was just one of those freak things.”

The Blues finished Sunday’s game with one fit man on the bench, with Ed Curnow hurting his leg after clattering into the goal post in the last quarter.

Curnow will also have scans on Monday.