In response to Serena Williams who had fitness issues saying "gender should not be confused with greatness". In Tennis, men are made to play best out of five matches but women are made to play best of three
Why did you mention Serena Williams? What does that mean?
First of all it means that women are easily wearied by physical activity and secondly it has to do with her history of losing matches, which affected the way she played.
Just because the matches are different for men and woman, does not mean woman are not as athletic. Those rules are basic on archaic, unfounded ideas, and I would suggest you update your thinking about women with more current knowledge.