Geelong captain Tom Harley will return from injury to lead the unbeaten AFL club against Port Adelaide at Skilled Stadium on Sunday.

A hamstring tear has kept Harley out for the Cats' past two games, against West Coast and Fremantle in Perth, which came either side of the club's mid-season break.

The skipper has managed just four games for the season so far, after missing the first six with a knee injury.

But coach Mark Thompson said he would definitely be ready to take on the Power.

"He's going to play this week, he's ticked all the boxes," Thompson told the AFL website.

"He's given himself almost another week to make sure he's right.

"He missed last week's game, but I suppose (the break came at a good time) because he didn't miss an actual game but got the (extra) week of rehab in."

However, the club's No.1 ruckman Brad Ottens, who has been out since round two with a knee injury, is still several weeks away from a return.

He has resumed running and could join his teammates on the training track next week.

But Thompson said the long period on the sidelines had taken a toll on the big man's fitness.

"He had a really good summer, but then he spent probably six weeks where he didn't run so building up your fitness base again, that's not a good thing," Thompson said.

"We wish he was playing. He'll be happy to be match-fit again."

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