SAM POWELL-PEPPER has ruptured his anterior cruciate ligament and will miss the remainder of the 2024 AFL season.

The gutsy forward injured his knee in a marking contest during Friday night's win over St Kilda, with scans on Saturday confirming the news.

Powell-Pepper will undergo surgery to repair the ligament in the coming days.

"We are incredibly disappointed for Sam," Port Adelaide Head of Medical Services Tim O'Leary said.

"Sam is a dedicated and diligent athlete who attacks his training with unrelenting intensity, and will no doubt approach his rehab the same way. He will continue to be as involved as he can, as a leader and important member of our playing group.

"It's such a tough injury for a footballer to go through. We're all behind him and we know he'll come out the other side stronger and more determined."

Meanwhile, imaging has confirmed a low-grade hamstring strain for captain Connor Rozee.

Rozee felt tightness in his hamstring following a kick, and will be assessed throughout the week to determine his availability for the Showdown.

Key defender Aliir Aliir has entered concussion protocols and will miss the game against Adelaide.