Fremantle defender Joel Hamling limped into the change rooms with a lower leg injury.
Hamling landed awkwardly in a marking contest and went straight into the rooms midway through the fourth quarter.
He returned to the bench but took his boots off and is not expected to return to the field.
The injury follows a suspected knee injury to luckless teammate Alex Pearce, who was subbed out of the game in the second quarter.
