This is an ongoing most popular debate on the tennis forums, as in every respective sports forums. I made this earlier in the year as a way to figure out a "Greatest of all Time". Given all the factors involved and changes in the sport and technology it's not very exact and easily debatable as you can see. So I got this list using three main catergories and their respective ranks verses other players in the modern game. Most hardcore fans have either Federer or Nadal at #1, but I got Nadal at #4 with 1/3 of my overall value given to combination of the 4 Slams and WTFs (indoor finals). This gives more strength to the likes of Pete Sampras but hurts Nadal, given he's not as well rounded in his game - dubbed "the King of Clay". Also 1/3 value given to career match winning percentage - this helps the likes of Bjorn Borg who played much less but was much more efficient. Most would not agree with me as they place value on Masters, which Nadal is #1 for example. But that is applied I think to the weeks at #1 category, 1/3 of overall. You see how debatable this is. Djokovic has lost several matches since this was made but don't think lower percentage than Nadal. Even so, if they would leapfrog each other in that category, the overall rankings would remain. Djokovic has a winning H2H Vs Nadal btw. WTF is World Tennis Finals (or year-end indoor final of the top 8 players in round robin format). It's the most scored tournament after the 4 Majors (Slams). These combined are "the business end of the tour". I might play around and add the Masters count to the 1st category and see how this affects the overall ranking. Zeke's Tennis GOAT Ranking Guess who's #1 today?