 Almost impossible to do this because it's never an apples to apples comparison. I don't know. And like Messi and Ronaldo are not 10 spots apart, but they are on this list. The tennis guys at the top go Federer, Djokovic, Nadal. And Federer's got a lead on the other two guys. They're basically back to back. But Djokovic is now unquestionably the best player ever. So how is Federer ahead of Djokovic on this list?