Key Port Adelaide veteran Travis Boak has been ruled out of the Power's clash with Richmond at the MCG.
Boak was cleared of serious injury following a heavy collision with Melbourne hard-nut Jack Viney during Port's thrilling win at the Adelaide Oval last Friday night.
Despite being named in Port's squad on Thursday, Boak has reported ongoing soreness to his ribs and will not face the Tigers on Sunday.
The former Power captain has been replaced by ruckman Brynn Teakle in the extended squad.
Port are already depleted, with captain Tom Jonas (suspension) missing, as well as key forward duo Charlie Dixon and Todd Marshall.
