I know there has been talk regarding Fed & Nadal's player exclusive shoes over the years... But we're coming to a slam now where the top three players in the world are wearing Nike shoes that cannot be purchased by the public. Dimitrov is wearing a shoe that debuted in 2012, with some customization done, that can no longer be purchased. Rafa is going to be wearing the same shoe as the last couple of years, with heavy customization done, that can no longer be purchased. Fed is the only one...
Nike's custom shoes
Nike's custom shoes