PORT Adelaide's defence will be tested with Jack Hombsch to miss at least the next two weeks with a hamstring injury.
Already without the suspended Tom Jonas for another five games, the Power will be calling on reinforcements for Sunday's clash with Collingwood at the MCG.
Hombsch tweaked his hamstring during the last quarter of last Saturday's 45-point win against Melbourne in Alice Springs.
The Power will turn to either the experienced Alipate Carlile or hand a senior debut to Canberra product Logan Austin.
Port Adelaide midfield coach Michael Voss told reporters on Wednesday that the news about Hombsch wasn't good.
"Will be a couple of weeks,'' Voss said.
''(Alipate) Carlile will be one of the options, Logan Austin is the other.
''Certainly we will have to make that adjustment.
''(Carlile) has had a couple games under his belt (in the SANFL) so he'll definitely come into consideration as will Logan.''
Carlile has played the past couple weeks in the SANFL after breaking his wrist in the round two clash with Adelaide.
Austin was taken by the Power with the 69th pick in the 2014 NAB AFL Draft and earlier this year agreed to a two-year contract extension until the end of 2018.
The Power (5-5) are on the verge of the top eight with captain Travis Boak shrugging off a slow start to the season, averaging 25 possessions in the past two games.
"The last couple weeks he has been fantastic and he's led exceptionally well,'' Voss said.
"The way he's got the players really focused and taking on the challenge has been the impressive part of his leadership.
''Sometimes it's about persistence.
''When you're struggling a little bit early, you've got to keep believing.
''My main message to Travis was to reinforce that he prepares himself exceptionally well.
''When he does that, he gives himself a chance to turn it around.''
Power vice-captain Brad Ebert could be in for another tagging role on either Scott Pendlebury or Adam Treloar after he negated the influence of Demons gun Jack Viney.
''He did a great job, got a few slaps in the face because of it, that's the lie of the land for blokes who play in that position,'' Voss said.
"Pendlebury has spent some time playing in different positions, but when he's played in the middle of the ground and he's fit and healthy, they look like a different side.
''Treloar has been fantastic throughout the whole season.
''He's certainly getting a lot more mates and when you look at the sides they've played in the past few weeks, they've competed really well against some elite midfields.''
The Power will continue with Jackson Trengove as a makeshift ruckman knowing they need to win the ball when it hits the deck.
''It's had some challenges, but we're certainly not winning the hit-out,'' Voss said.
''What he's given us is terrific competing ability on the ground.
''He's like another midfielder.
''When it hits the deck, he gets his hands dirty.
''All we're after him to do is try to contain the ruckman as best he can.''
