Liverpool were above Real Madrid as Adidas's biggest brand until at least two years ago... But I guess they may have sold a load of Ronaldo and Kaka gear since then.
Look: http://www.guardian.co.uk/football/2009/jun/18/javier-mascherano-liverpool-barcelona
Last paragraph: Arbeloa said: "In the last few years the Premier League has been much better than the Spanish league, but now that may even out thanks to factors that could give the Premier League more problems than in previous years, like the fall of the pound and the raise in taxes. They will make a lot of players move to Spain. Mind you, Adidas told me that the Liverpool shirt is their best seller, more so even than Madrid, so that shows that the Premier League has reached every corner of the world."
Look: http://www.guardian.co.uk/football/2009/jun/18/javier-mascherano-liverpool-barcelona
Last paragraph: Arbeloa said: "In the last few years the Premier League has been much better than the Spanish league, but now that may even out thanks to factors that could give the Premier League more problems than in previous years, like the fall of the pound and the raise in taxes. They will make a lot of players move to Spain. Mind you, Adidas told me that the Liverpool shirt is their best seller, more so even than Madrid, so that shows that the Premier League has reached every corner of the world."