Powerhouse West Coast forward Josh Kennedy has suffered a setback in his comeback bid from a calf injury and looks certain to miss a blockbuster clash with Melbourne in Perth on Saturday.

Kennedy is understood to have a slight tear in his Achilles tendon and ended his desperate bid to recover in time to confront the rapidly rising Demons.

Josh Kennedy is set to miss another game due to an ongoing calf injury. Credit:Michael Dodge

He is tipped to be sidelined for at least another fortnight, missing the Demons as well as a road trip for a showdown with inconsistent reigning premiers Western Bulldogs at Etihad Stadium on Saturday-week.

It is understood that as much as a month out of action could be required by the big forward to fully overcome the new strain in his troublesome right calf.