Joshua Brillante, Jordy Buijs and Filip Holosko were on target before half-time as Sydney saw off Perth for an A-League Grand Final place.
A-League premiers Sydney FC eased into the Grand Final thanks to a 3-0 win over Perth Glory, with the video assistant referee system (VARs) very much to the fore at the Allianz Stadium.
Sydney finished the season having dominated all-comers, suffering a solitary defeat and collecting a record haul of 66 points.
Any fears Graham Arnold's men might not take their imperious form into the post-season campaign were assuaged when Joshua Brillante fired a stunning long-range opener into the top corner after 21 minutes.