That is indeed a fact.
Henin has in fact beaten Serena when Serena was at her exact peak/miles ahead of almost everyone when she was holding 4 slams:
2003 Charleston F Henin def. Williams 6-3 6-4
2003 French Open SF J. Henin def. Williams 6-2 4-6 7-5
So then, if one can beat Serena at her absolute all-time peak and double down on that performance, then one have nothing to prove whatsoever (NadalAgassi's fantasy notwithstanding).
Anyways, this thread's a flop since it's premise is entirely built on yesterday's Charleston debacle (Stosur V Serena) which has no bearing on anything that happens from now on cuz unlike in Charleston, Serena will in the coming red clay season NOT have the luxury of facing a 10% capacity player who the prevoius day had played a total amount of six sets within six hours
.