The Dockers have failed to fire in their season opener against the Dees losing by 22-points.
To make matters worse defenders Alex Pearce (knee) and Joel Hamling (leg) both failed to finish the game.
Both missed the entire 2020 season and are now both set for more time on the sidelines.
Matt Taberner booted three goals, two of them late in the game to be Fremantle's leading goal scorer in the 11.14.80 to 8.10.58 loss.
Andrew Brayshaw was the best ball winner collecting 29-disposals while skipper Nat Fyfe had 27 touches and nine clearances.
The Dockers are back at home next week taking on the Giants.