Originally Posted by smoledman
Federer is a freak of nature. No point in bringing him up in these conversations.
It's about Fed's technique. He also doesn't have a regular ww motion. Federer gives so much spin with his eastern grip, flat trajectory and a glass cannon body by following a pronation-supination-pronation route. WTA players basically use a push stroke technique that doesn't allow to use these pronation things but depends on pure racquet head speed that created by the body torque and core strenght. Women are physically weaker and slower in legs compared to men and they spend the energy mostly to positioning than creating racquet head speed. That's why they need to hit flatter to make some penetrating shots.