PORT Adelaide captain Travis Boak will assess at the end of the year if he continues into a seventh season as the Power's skipper, but his priority is ensuring the Power punch their ticket to September.

The eighth-placed Power have dropped four of their past five games, and face a huge test against Collingwood at the MCG on Saturday, especially with ruckman Paddy Ryder (hip flexor), winger Jared Polec (hamstring) and defender Dan Houston (neck) in doubt.

Boak is the Power's longest-standing captain having succeeded Dom Cassisi in 2013.

Vice-captain Ollie Wines is the logical choice to take over from Boak after he signed a four-year extension until the end of 2022.

Boak, 30, has played 241 games for the Power and is signed until the end of next year.

"Ollie's been outstanding all year as vice-captain, along with the rest of our leaders," Boak told AFL.com.au.

"I've enjoyed the challenge I've had this year and I'm still hoping to have a few more weeks to go this year as captain.

"We'll sort of assess at the end of the year and go from there, but right now, all of my focus is on is making sure I lead this group."

The Power led the entire game against West Coast last Saturday before goals to Mark LeCras and Jeremy McGovern allowed the Eagles to steal victory after the siren.

Boak said the players reviewed the final stages of the game and took some valuable lessons out of it.

"There were certainly different challenges in the game we didn't handle well enough," he said.

"We probably could've controlled the ball a lot more and there were options we should've used.

"That last play, there was a lot of yelling going on, the crowd was really loud.

"The communication wasn't right and we could've done it a lot better."

The Power will field a more mobile forward line against the Magpies with key forward Charlie Dixon out for the rest of the season with a broken leg.

"You can't really replace Charlie, so we'll have to move a few things around," Boak said.

"We've still got a very dangerous, potent forward line with Robbie Gray, Chad Wingard, Jack Watts, Sam Gray and Aidyn Johnson.

"There's some quick, dangerous guys down there that will cause problems for opposition sides, so we've got to make sure we get it in there enough."

The Power's spluttering attack has been central to their five-week fade.

They've scored an average of 67.4 points per game in rounds 17-21 compared to 86 points from rounds 1-16.

Defence hasn't been the issue – restricting teams to 66.2 points per game from rounds 17-21, compared to 73.1 from rounds 1-16.

"We're really positive in terms of how we've been playing our footy," Boak said.

"Our ball movement's improved in the last few weeks and defensively, we've been outstanding pretty much all year.

"We're going into this weekend with a lot of confidence in terms of the footy we're playing, but we've just got to get the result."