St Kilda has finalised its 23-man squad that will line up against Port Adelaide at the Adelaide Oval on Sunday.

The Saints will only make one change from the lineup that faced the Tigers in Round 3, with Liam Stocker replacing Liam O'Connell (concussion) in the starting 23.

Skipper Jack Steele was initially named in the extended squad, however was replaced by Arie Schoenmaker on Friday afternoon after failing a fitness test on his knee.

Schoenmaker has now been named as an emergency for the clash, along with rookie Hugh Boxshall and Harry Boyd.