I've got Sydney on the back foot just with the subject line. It has to take an active position against the superior Melbourne.
You may have noticed on occasion some bantering between Victor and myself over the supposed merits of our respective cities, mine being Melbourne and his being Sydney. If you are from Melbourne or Sydney, you will understand. If you are not, like from overseas or even worse, one of the BAPH cities, maybe you don't.
This brief article explains the rivalry and its origins quite well.