You are coming up with these terms "pound for pound skill" and "accomplishment on clay" and yet I've already provided the statistics that prove that the gap is bigger between Federer and Nadal. These are stats. I'm not making them up.
If Federer was young and Nadal achieved those records before Federer became a full force, you might put an asterisk next to those stats but all those achievements were attained when Nadal was the younger, less experienced one and Federer at the peak of his powers except maybe last year's final.
The statistics prove that Nadal is a far superior player (on clay) to Federer despite being many years younger than him and that is why the gap between them is larger.
Fact is, if Federer were closer to Nadal in terms of clay court ability, he should've won 2006 or 2007 French Open finals. Those were the years when he won the other 3 slams also.
As for Serena and Justine. I have absolute confidence that if at their best Serena has a better chance to beat Justine on clay than Federer against Nadal. That's because Serena proved with the Serena Slam that she is equal to any woman on any surface at her best by holding all four slams at the same time.
Who else has done that? Steffi Graf. Isn't she the one everyone says is an all-surface wonder? Why then, when the same achievement is achieved, the same credit is not given? Agenda?
what stats are you talking about????
federer has been beaten by nadal on clay several times because he was good enough to reach the stage where nadal usually is - THE FINALS!
whereas when was the last time serena has reached the finals of the french open? when has she last won a title on red clay???
no one is saying nadull is not superior player to federer on clay.HELL nadull is superior player to EVERYONE on clay but WHY WHY WHY can't you get into your head that in the list of all time greats the gap between nadal and federer much narrower than the gap between henin and serena
and what statistics can u give to prove that gap between henin and serena is narrower
the fact that serena has not been able to reach final stages on clay for almost 10 years now?
the fact that she only met henin 5x on clay (mostly in part due to serena just not getting very far on clay a lot of times) and beat henin ONCE out of those 5x?
the fact that serena NEVER beat henin at french open (same as federer not being able to beat nadal)
so what are these stats u speak of that are supposedly SOOOOO much in serena's favor
just keep making stuff up as you go along
federer was at least able to bagel nadal on clay once and took nadal to 5 sets in red clay of rome