GREATER Western Sydney will be without gun defender Phil Davis for the remainder of the season due to a knee injury.

The former skipper has been battling bone bruising to his right knee and it has flared up to the point where is unable to train.

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The 30-year-old hasn't played since round 10 when he suffered a medial ligament strain to his opposite knee that has since healed.

Davis has returned home to Sydney and will need at least eight weeks of rest. He will also undergo a minor procedure on the iliotibial band in his right knee.

"Phil has been managing this injury across this season but unfortunately it's reached the point where only a long period of rest will fix the problem," Giants GM of football Jason McCartney said.

"With that in mind, it was decided that it's in Phil's best interests to return home to Sydney to be with his partner and family and he’ll undergo minor surgery in the coming days.

"Phil’s an incredibly important part of our line-up so it’s disappointing for us on-field but this is the best option to make sure he's fully fit for the 2021 season."

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The Giants are clinging onto eighth place after Tuesday night's shock loss to Adelaide.