Sydney FC's new jersey for the 2013-14 season is set to be their highest selling yet as international retailers jumped at the chance to stock the item that has polarised Sky Blues fans.

The home shirt of Sydney FC, made by adidas, will be sold in Australia, south-east Asia, Japan and Italy. It has yet to be unveiled in Australia, but some overseas retailers have been too impatient to wait for the official release date and began selling the new kit.

Sydney FC's new strip.

It will be the first jersey release since the club signed marquee player Alessandro Del Piero and the manufacturer's Japan store took the opportunity to sell the item to coincide with the visit of the Italian in Sydney's friendly against J-League team Sagan Tosu.

Sales have since been suspended and the item removed, but adidas is pleased with the demand for the A-League club's merchandise.