In 2003, Adidas filed a lawsuit in a British court challenging Fitness World Trading's use of a two-stripe motif similar to Adidas's three stripes. The court ruled that despite the simplicity of the mark, Fitness World 's use was infringing because the public could establish a link between that use and Adidas's mark.[13]
In September 2004, top English fashion designer Stella McCartney launched a joint-venture line with Adidas, establishing a long-term partnership with the corporation. This line is a sports performance collection for women called "Adidas by Stella McCartney",[14] and it has been critically acclaimed.[15]