Port Adelaide captain Domenic Cassisi admits the club let down their milestone men in Sunday's 50-point AFL loss to West Coast but has promised the Power will make it up to them against Melbourne this week.

The Power were woeful against the Eagles on a day when Chad Cornes notched his 200th game and Shaun Burgoyne (150), Brett Ebert (100) and Toby Thurstans (100) also reached milestones.

"That's probably the most disappointing thing out of it," Cassisi said on Monday.

"Four guys that have had a big contribution to our club and for us not to be able to get the points for them, they all had their families fly over from interstate and make the trip and it was a disappointing day for them and we feel as though we let them down."

Port Adelaide entered their forward 50 as many times as West Coast but their sloppy skills and wayward kicking let them down.

"Look, it was definitely uncharacteristic of us, especially early we were a bit fumbly and not as clean as what we try and pride ourselves on," Cassisi said.

"Obviously the Eagles came with a lot of intensity and brought a fair bit of heat to the game and looking back early, we probably didn't cope with that very well.

"We briefly discussed it (our lack of intensity) amongst the playing group, we've got to come and play (against Melbourne), especially at home.

"We'll get out there this week and really work on our skills and make sure we tidy that up as well and look forward to the Melbourne game."

After a solid pre-season campaign and a 41-point win over Essendon in round one, some pundits were predicting Port Adelaide could be top-four contenders.

Cassisi hoped the big loss to West Coast could prove to be an early turning point for the Power.

"I hope we look back in three or four weeks and that's the case," Cassisi said.

"We had a really good NAB Cup and like I said we go back now and look at the review and treat it as though we've got to learn from it and improve.

"In three or four weeks time, we might look back and say that's the wake up call we needed."

But the Power will be without Justin Westhoff for up to six weeks after the 22-year-old forward broke his foot early in the second half against the Eagles.

"We've got some good depth at the club and Justin Westhoff's brother, Matthew Westhoff, is playing good footy in the SANFL so I'd say he'd be every chance of coming in," Cassisi said.

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