Nope, that's not my argument. I guess that's a strawman for you too then.Please. This is a textbook strawman argument. No one is saying that all top tennis pros are superhuman athletes (although probably a few are). YOUR argument is that any "average" athlete (with respect to natural athleticism) can become a top pro with sufficient training and mental coaching, etc etc. Most folks here are disagreeing with you and simply saying that you better start off with at least better-than-average (and preferably elite) natural athletic gifts if you want to succeed as a pro in tennis. This does not equate to a belief that "all tennis players are superhuman athletes." You're just making stuff up now.
Again, theiy may be gifted in skill or mental fortitude, as you can't really teach all of it. I'm saying that the level of fitness we see on the tour as of yet does not require any special talent. Special talent = superhuman = NBA.