It was a record regular season crowd in New South Wales as 40,388 packed the Sydney Football Stadium for the first derby of the year as the RBB and the Cove sang for their sides with the passion that sends football apart from the rugby codes.
Alessandro Del Piero was out for Sydney FC and as such they were really lost in attack as they had no one there to spur their side on offensively.
It was tight early on as both sides had to let the emotions and passion subside as they played in front of the parochial crowd but it was the Wanderers who were the first to settle.
It took 11 minutes for Western Sydney to find their goal as Shinji Ono floated a free-kick over the Sydney FC defense for Iaccopo La Rocca who beat Seb Ryall to head home the opening goal.
Western Sydney could well have made it two on the quarter hour but were denied as Tomi Juric's pass found Youssouf Hersi who buried the effort but set off too soon being denied by the assistant's flag.
The second goal came in the 26th minute as Ono again proved crucial as he was able to chip over the Sydney FC defense leaving Ryall and Tiago Calvano looking silly allowing the Japanese veteran to run on to the ball and slam home the second goal for the Wanderers.
Sydney were able to have one chance in the 33rd minute but Nikola Petkovic saw his long range free-kick bounce back off the cross bar, the last real chance in the half leaving the match 2-0 at the break.
The second half saw Western Sydney content to just pass the ball around and keep the hosts out of the contest.
Sydney FC for their part tried but really struggled to break through a defense that was the best in the league last season.
Western Sydney were able to hold on for the 2-0 victory that sees clear gaps emerge in the A-League ladder as the top and the bottom start to split while it is tight at the top.