PORT Adelaide will be without defender Ryan Burton for up to a month with a hamstring injury.

However, star forward Robbie Gray could return from a broken hand for Sunday's clash with Gold Coast, while key forward Charlie Dixon is on track to be back after the mid-season bye.

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Burton will miss three to four weeks after injuring his hamstring in the opening quarter of the Power's 20-point loss to Adelaide in Showdown 46 last Saturday night.

Ryan Burton has been ruled out of the rest of the game with a hamstring injury.#AFLPowerCrows pic.twitter.com/I9sOsruRYZ — AFL (@AFL) May 11, 2019

Gray will be assessed this week to determine if he's available to take on the Suns at Adelaide Oval.

"The thing that will probably get in the way of Robbie's quick return will be touch ... I don't think it will have anything to do with the injury to his hand," assistant coach Brett Montgomery told reporters earlier on Monday.

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"Once that cast was off and once he was back moving it again, it comes back to pain and touch.

"So I like that he has left the door open (to return). That is certainly the way I'm looking at it."

Co-captain Tom Jonas has already been ruled out and will miss a fourth straight game with a calf injury, but is expected to return for the round 10 clash with Hawthorn.

The Power haven't given a timeline on when midfielder Brad Ebert will return from concussion.

But there's better news for Dixon, who is three to four weeks away from playing his first game since suffering a badly broken leg late last season.