West Coast coach John Worsfold has slammed his team's poor fitness levels after the Eagles' latest fade-out in Sunday's 38-point AFL loss to Fremantle.

The Eagles led by 23 points early in the second quarter but kicked just two of the next 15 goals as Fremantle ran out easy 17.9 (111) to 10.13 (73) winners.

West Coast have not won a final quarter all season and Worsfold conceded it was an issue that required urgent attention.

"It seems to be a fitness thing so we have to address that and look at why that could be the case," Worsfold said after his team slumped to a 1-5 win-loss record.

"It's not an easy fix but it's too consistent now to not think it's playing a part.

"It (our poor disposal efficiency) is linked to fitness, there's no doubt about that."

The Eagles, who take on Hawthorn at Subiaco Oval on Saturday, will be without Chris Masten for at least several weeks after the nippy midfielder injured the posterior cruciate ligament in his knee.

Masten suffered a similar setback at the end of last year that required a lengthy rehabilitation period over summer.

Recalled forwards Quinten Lynch and Ben McKinley failed to kick a goal between them and while Worsfold described Lynch as "serviceable", he was far more scathing on McKinley, who missed two crucial shots on goal just before half-time.

"His job is to kick goals and he missed them today so he didn't really deliver on what he brings to the team," Worsfold said of McKinley.

"He needs to address that."

While Fremantle skipper Matthew Pavlich kicked five goals and midfielder Michael Barlow won the Ross Glendinning medal as best afield, coach Mark Harvey praised his team's defensive effort.

Luke McPharlin blanketed Lynch, Chris Tarrant did a good job on Mark LeCras (two goals), and Paul Duffield and Greg Broughton provided plenty of drive.

"When we didn't have momentum in the game and they (West Coast) looked like they were getting it inside 50 without a lot of pressure our defence stood up," Harvey said.

"There was a period in that third quarter where they had it inside their forward 50 and we just fought and fought and didn't allow them to get a goal.

"It went for about six or seven minutes. A lot of our defenders had really good, desperate, aggressive games.

"They work very well with each other and are selfless with each other."

Fremantle have lost just one of their final quarters this season, coming from behind in wins against Essendon, Geelong, Richmond and West Coast.

"It's so important the group can bring itself to stop that (run on from other sides) and then get back into the game quickly," Harvey said.

"To remain composed and not panic about situations - you are not always going to be in front, you are not always going to play well for quarters."

Harvey refused to get carried away with the Dockers' 5-1 start to the season ahead of Saturday's clash with Brisbane at the Gabba.

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