KARL AMON is out of Thursday night's clash with a knee problem.

It comes after Port Adelaide initially named no changes to its side in the usual team sheet lodgement, 90 minutes before the first bounce.

Ken Hinkley confirmed in Wednesday's presser than Amon was managed through training after suffering a knock against Geelong.

He will be replaced in the selected side by Jimmy Toumpas.

Toumpas has been one of Port Adelaide's leading SANFL players so far this season.

Port Adelaide plays Hawthorn at 7.20pm ACST on Thursday night.

More to come...