JUSTIN Koschitzke is a certainty, and Max Hudghton is a possible inclusion for St Kilda's clash with Port Adelaide at Telstra Dome this Sunday, according to Saints vice captain Lenny Hayes.

Koschitzke missed the loss to West Coast through suspension, but Hayes said he was sure to come straight back in.

"He's a quality player, and I think we're a much better side when he's in it, so he should come back in," Hayes said of the NAB AFL 2001 Rising Star.

Hudghton injured a calf in the first term of last Saturday's game, but Hayes sounded hopeful that the team would regain the services of the experienced defender.

"I think we'll give Max up until Friday to see how he is. Robbie Harvey had something similar a couple of weeks ago, and he ended up getting up for the game, so I think we've just got to give him a bit of time and see if he can get up for training on Friday.

"We're just going to have to wait and see, but I don't think it's a major one, so he could get up for the game."