As marketing stuff ups go, this one hits the back of the net.
Adidas has come under fire for it's new limited edition shoe, the "Stretford".
The design and name are inspired by English Premier League club Manchester United, and you'd think that fans would be happy. But not so.
The shoe - part of a 10-year sponsorship deal with the club worth over $1.5 billion - has one simple but major mistake.
The patent Adidas stripes on the shoe are blue, the colour used by arch-rival team Manchester City.