From the open era
Serve: Serena is the best,
Nav, Court and Graf the second bests.
Return: Seles is the best.
Linsay is the second.
Volley: King and Nav as the best.
Court seconds to them.
Forehand: Graf is the best. She dominates this category with a wide lead.
No other players come close to the standard Graf sets for a great
Backhand: Henin as the best.
Evert, Seles, Hingis and Serena are close seconds.
Overhead: Nav as the best.
Court the second.
Lob: Evert the best.
Hingis the ssecond.
Drop: Hingis the best.
Evert the second.
Movement(speed and footwork): Graf is the best.
Goolegone, Sanchez and Venus the second.
Mental Strengh: Evert, Graf, Seles and Serena are all tier 1 players in this aspect.