PORT ADELAIDE captain Travis Boak is all but a certain starter for the Power's round one clash with Fremantle at Adelaide Oval on Saturday.

Boak missed the Power's second game of the JLT Community Series against Adelaide with tightness in his right hamstring.

"I'll be right," Boak told reporters.

"I got through some training on Saturday, I've got to get through Tuesday and Thursday, but it feels really good.

"There was a minor hotspot a couple of weeks ago, we just took a cautious approach and I've got through all the training so far and tick a couple more boxes and I'll be right to go."

Star recruit Tom Rockliff (knee) and midfield bull Sam Powell-Pepper (shoulder) are also on track to face the Dockers.

"Rocky trained Saturday and got through that session," Boak said.

"Sam is good to go as well.

"He trained Saturday and got through that session, again he'll get through this week and be ready to go, so we should have a full-strength side."

If Rockliff does take his place in the side, it will be his first game for the Power after missing both pre-season matches.

Boak believes the former Brisbane skipper has done enough work to get himself ready despite a lack of games.

"He's had a fantastic pre-season, he's done all the work apart from a couple weeks where we had to slow him down a little bit," Boak said.

"He's a player that could come straight in and make an impact straight away.

"There's no risk I don't think there of him coming straight in."

Defenders Jasper Pittard (hamstring) and Matthew Broadbent (ankle) are the Power's only two players unavailable for the season opener.

Pittard's absence opens the door for impressive 21-year-old Riley Bonner to play just his fifth career game.

Bonner made his debut in the final game of the 2016 season, but had to wait until round 22 last year to return to the side, holding his spot for the last three games, including the elimination final with West Coast.

"What he adds is a lot of composure through the half-back line, a beautiful kick and he takes the game on," Boak said of Bonner.

"You've got to have those players coming off half-back and really want to create.

"Jasper's certainly one of those, and I think (Riley) is going to be a fantastic player and hopefully gets his opportunity in round one."

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