I think when you compare Nadal to Jordan, there simply closer similarities beyond popularity, transcending the sport etc.
Most basketball fans consider Jordan to be the most mentally tough, cluchest and driven competitor the game has ever seen. They might argue that some guys had more talent (hell, people are even saying Lebron might be more talented than Jordan, and he may well be) but the crux of his "greatness" as an athlete is that he was the greatest competitor and mentally toughest baller the world has ever seen.
Nadal is the same animal. He's seen as the clutchest, most mentally tough tennis player ever. You ask most people who know tennis, which tennis player you'd choose to play for you if your life was on the line, the majority would say Nadal. In basketball the answer would be Jordan. These guys share the same intangibles as athletes, much moreso than Federer does with Jordan. Which is why on some level, the analogy of Nadal to Jordan makes much more sense. Nadal and Jordan seen as the "ultimate warriors" of their respective sports, in a way Fed, for all his grace and talent, simply isn't.
Most basketball fans consider Jordan to be the most mentally tough, cluchest and driven competitor the game has ever seen. They might argue that some guys had more talent (hell, people are even saying Lebron might be more talented than Jordan, and he may well be) but the crux of his "greatness" as an athlete is that he was the greatest competitor and mentally toughest baller the world has ever seen.
Nadal is the same animal. He's seen as the clutchest, most mentally tough tennis player ever. You ask most people who know tennis, which tennis player you'd choose to play for you if your life was on the line, the majority would say Nadal. In basketball the answer would be Jordan. These guys share the same intangibles as athletes, much moreso than Federer does with Jordan. Which is why on some level, the analogy of Nadal to Jordan makes much more sense. Nadal and Jordan seen as the "ultimate warriors" of their respective sports, in a way Fed, for all his grace and talent, simply isn't.