Cristiano Ronaldo has caused friction between himself and the Real Madrid hierarchy with his tenacious promotion of Nike, and has no thoughts of changing to Adidas.
Los Merengues' kit providers are Adidas and they were reported to be wholly unhappy when the Portuguese star turned up for his well-publicised medical at the club wearing their rivals' brand.
Having been one of Nike's key players for many years, Ronaldo agreed to step up a level by wearing a white t-shirt with the company's famous tick in orange as he checked in for his medical exam.
Adidas may recognise that it would cost millions to convert the world's most expensive player to promote their brand, but are not pleased at what appears to be a considered campaign by Nike to have him promote their name so blatantly.
In pre-season training Ronaldo has donned garish red boots that are also in stark contrast to Madrid's training colours of white and navy blue.
Kaka and Karim Benzema are with Adidas, but the fact that Ronaldo is not could end up costing the Spanish millions if the player continues to promote the American firm widely.
Madrid president Florentino Perez has been reported to want to renegotiate the club's deal with Adidas and was even said to be ready to turn to Nike if his demands were not met.
Lucas Brown, Goal.com