Port Adelaide will enter Showdown 46 without co-captains Ollie Wines and Tom Jonas and veteran Brad Ebert on Saturday night.

Wines was ruled out after scans revealed he had sustained a small fracture in his fibula.

Jonas was unable to recover from a calf strain he suffered in the lead up to the ANZAC Round game against North Melbourne.

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Ebert will also miss the game due to concussion.

The Crows will take on the Power at Adelaide from 7.10pm ACST.