The Sydney FC tifo stolen from a warehouse before Saturday's A-League derby could have been the factor which cost the Western Sydney Wanderers three points after the incident motivated the Sky Blue players and supporters.

Meanwhile, photos have emerged of the missing banner, stirring further debate as to whether the ploy was orchestrated by Wanderers supporters.

A photo of a man inside the warehouse from which the tifo was stolen was posted on social media by the page Ultras Mentality Australia. The photo has since been removed.