Sydney Olympic went in front four minutes in through Michael Vakis before two quick goals to the Wanderers rounded out a thrilling first 10 minutes.
Teng Kuol equalised for Olympic with 20 regular minutes to play but Nathanael Blair grabbed the points for Western Sydney in stoppage time.
Olympic joy turns to grief in final minutes
SYDNEY Olympic (pictured) have gone down 3-2 to the Western Sydney Wanderers in an action packed match at at Wanderers Football Park on Saturday night.