The Eagles have extended their stranglehold over the Dockers claiming Derby 49 by 13-points.
West Coast have now won eight in a row over their crosstown rivals the final score in a game that didn't really get to any great heights 10.9.69 to 7.14.56.
Fremantle had their chances to draw equal after controlling long periods of play after an opening quarter five goal to nil blitz from the Eagles.
Just before three-quarter-time they drew within 10-points before coach killer right on the siren from West Coast put the margin back out to 17 as they turned for home.
Both sides failing to make a major impact on the scoreboard as the Eagles did enough to hold the Dockers at arms length.
Jack Darling and Josh Kennedy booted three goals for the victors while Cam McCarthy, Michael Walters and Matt Taberner kicked two each fro Fremantle.
Shannon Hurn was awarded this third Glendinning-Allan medal recording 15-intercept possessions and a game-high six intercept marks.
He finished a vote ahead of David Mundy who was Fremantle's best collecting 36-disposals.
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