Comparing records is really hard but can we agree there is no other player in history better than all of the following men (in no particular order): Pete Sampras Pancho Gonzales Roger Federer Rod Laver Bill Tilden Don Budge Bjorn Borg Hence, if there is no other player that you can confidently say is better than all of these men - are we then right to say that they are the top 7 in history? Example: Okay Rosewall was a great player. Definitely one of the best of all time, but does any one really believe he was clearly better than either Laver or Gonzales? (his contemporaries). Hence, I declare that the above list represents the top 7 of all time - in no particular order. And let's just leave it there at that. I don't believe there has been anyone else better than everybody on that top 7 list above.