Perth Glory fans vented their frustrations at the club's hierarchy before causing a ruckus in the stands as the team slumped to a 3-0 loss to Sydney FC in Friday night's clash at nib Stadium.

Alex Brosque's double and a stunning strike from Bernie Ibini-Isei compounded Glory's woes on a dark day for the A-League club.

Revolt: Perth Glory fans set off flares during Friday night's loss to the Sky Blues. Credit:Getty Images

Before the match, Glory were kicked out of the finals and fined $269,000 after being found guilty of serious salary cap breaches over a three-year period.

Had Glory not been dealt the punishment, they would be sitting equal top of the table with just two rounds remaining.