it's a silly argument for both the men and the women to declare as FACT AND NOT OPINION any one single individual as the greatest of all time in a individual sport that has so many criteria, facts, stats, what if's, could of's not to mention the monumental change in equipment as the decades go on...
the best and the ONLY LOGICAL thing to do would be a LIST of all time greats, like a top 10 but in NO numerical order....
for example, I think any top 5 list for the men all time would be, once again, NOT in order, djokovic, federer, nadal, sampras, laver....
for example, I think any top 5 list for the women of all time would be, once again NOT in order, navratilova, evert, williams, graf, court....