Running defender Zak Jones is a late withdrawal from the side to face Port Adelaide at the SCG on Sunday.

Jones suffered some tightness in his calf on Friday and after failing to get up for the match has been replaced in the selected side by Robbie Fox.

Head of Coaching and Development John Blakey said Fox had proven what he could bring to the side.

"Foxy gives us some good bounce off half back, he is very athletic and that is what he has bought all pre-season," Blakey said.

"We will be looking for him to do that again today."